Field Installation of the 258-3911 Quick Coupler Conversion Kit (Hydraulic){5057, 5133, 5264, 5479, 6129} Caterpillar

Compact Track Loader:

289C (S/N: JMP1-UP)

299C (S/N: JSP1-UP)

Multi Terrain Loader:

287C (S/N: MAS1-UP)

297C (S/N: GCP1-UP)

Skid Steer Loader:

262C (S/N: MST1-UP)

272C (S/N: RED1-UP)

Introduction

This Special Instruction provides the information that is necessary for the installation of the 258-3911 Quick Coupler Conversion Kit (Hydraulic) .

Do not begin installation until you have read the information that is contained in this instruction. Also obtain the Operation and Maintenance Manual and the Disassembly and Assembly Manuals for instructions that are referenced herein.

Work safely. Most accidents that involve product operation, maintenance, and repair are caused by failure to observe basic safety rules or precautions. An accident can often be avoided by recognizing potentially hazardous situations before an accident occurs. A person must be alert to potential hazards. This person should also have the necessary training, skills, and tools in order to perform these functions properly.

Safety precautions and warnings are provided in this instruction and on the product. If these hazard warnings are not heeded, bodily injury or death could occur to you or to other persons.

Required Parts

The required parts for field installation of the quick coupler arrangement are provided in this section. Refer to Table 1 for the required part in order to install the 258-3911 Quick Coupler Conversion Kit (Hydraulic) .

Preparing the Machine

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Personal injury can result from hydraulic oil pressure and hot oil. Hydraulic oil pressure can remain in the hydraulic system after the engine has been stopped. Serious injury can be caused if this pressure is not released before any service is done on the hydraulic system. Make sure all of the work tools have been lowered to the ground, and the oil is cool before removing any components or lines. Remove the oil filler cap only when the engine is stopped, and the filler cap is cool enough to touch with your bare hand.

1. Park the machine.

   Note: Refer to "Machine Parking" in the Operation and Maintenance Manual for your machine.

2. Release hydraulic system pressure.

   Note: Refer to "Release Procedure (Hydraulic System Pressure)" in the Disassembly and Assembly Manual for your machine.

Disassemble the Manual Coupler

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Illustration 1	g01294859
(A) 215-3961 Coupler Handle and Pin Gp (B) 215-3960 Coupler Handle and Pin Gp

1. Perform Step 2 through Step 5 in order to remove mechanical lock group (A) from the quick coupler.

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Illustration 2	g01381585
Section A-A in Illustration 1 (A) Mechanical Lock Group (RH) (C) Locknut (D) Washer (E) Spring (F) Spacer (G) Bolt (H) Washer

2. Remove locknut (C). See Illustration 2.

   Note: Use caution as you remove the nut. The spring tension will be released as you remove the nut.

3. Remove washer (D), spring (E), and spacer (F) .

4. Remove bolt (G) and two washers (H) .

5. Withdraw Handle Group (A) from the quick coupler.

6. Repeat Step 2 through Step 5 in order to remove Handle Group (B) from the quick coupler.

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Illustration 3	g01895433
(A) 215-3959 Coupler Handle Gp (K) 192-2642 Pin (L) 166-2560 Spring Pin (8) 195-8754 Upper Spring Pin

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Illustration 4	g01381680
New Link Assembly (J)

Note: A new link assembly (J) is preassembled with the quick coupler kit. The new link assembly is used with the 258-3911 Quick Coupler Conversion Kit . See Illustration 4.

Note: The existing 215-3959 Coupler Handle Groups (A) will not be reused.

7. Disconnect the 192-2642 Pin (K) from both 215-3959 Coupler Handle Groups (A) by removing the 166-2560 Spring Pin (3). See Illustration 3.

   Note: Retain the 192-2642 Pins (K) for reinstallation.

8. Disconnect the handle from the 215-3959 Coupler Handle Groups by removing the 195-8754 Upper Spring Pin (8a) .

Installing the Cylinder Group

This section provides instruction for installing the coupler cylinder and the link assembly on the existing 258-2790 Quick Coupler Ar .

1. Perform Step 1.a and Step 1.b in order to preassemble the coupler link group.
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   Illustration 5	g01449846
   New link assembly (J) assembled to the 192-2642 Pin (K) . (3) 303-8767 Spring Pin (5) 311-9240 Plate (6) 319-2137 Bracket (8a) 310-6660 Upper Spring Pin (8b) 303-8768 Lower Spring Pin (14) 192-2645 Spring (47) 315-5493 Hard Washer (K) 192-2642 Pin

   1. Connect the new link assembly (J) to the 192-2642 Pin (K). Use a 166-2560 Spring Pin (3) in order to assemble these components.
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   Illustration 6	g01895613
   (7) 192-2640 Coupler Cylinder Gp (8b) 303-8768 Spring Pin (6) 319-2137 Bracket (K) 192-2642 Pin

   2. Assemble a 192-2640 Coupler Cylinder Gp (7) to the new link assembly (J). Use a 303-8768 Spring Pin (8b) in order to assemble these components.

2. Repeat Step 1.a and Step 1.b in order to preassemble the second coupler link group.

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Illustration 7	g01294867
(12) 218-6332 Bracket (LH) (13) 218-6333 Bracket (RH)

3. Install the 218-6332 Bracket (12) and the 218-6333 Bracket (13) on the quick coupler. Use the four 8T-4196 Bolts and the four 8T-4121 Hard Washers that are provided on the top plate of the quick coupler. See Illustration 7.

   Tighten the bolts to a torque of 55 ± 10 N·m (41 ± 7 lb ft).

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Illustration 8	g01294873
(46) 8T-4121 Hard Washer (48) 8T-4133 Nut (53) 8T-4196 Bolt

4. Secure the outside edge of brackets (12) and (13) to the quick coupler. Use two 8T-4196 Bolts (53), four 8T-4121 Hard Washers (46), and two 8T-4133 Nuts (48) to fasten each bracket. See Illustration 8.

   Tighten bolts to a torque of 55 ± 10 N·m (41 ± 7 lb ft).

5. Perform Step 5.a through Step 5.b twice in order to install the coupler link groups that were preassembled in Step 1 and Step 2.
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   Illustration 9	g01294879
   (10) 207-9785 Pin (33) 3B-4628 Cotter Pin (36) 5P-0372 Lock Pin (45) 8L-5188 Pin (46) 8T-4121 Hard Washer (59) 9T-7303 Spacer

   Note: Coat the pin bore with lubricant before inserting the pin.

   1. Attach the link to the quick coupler. Use a 207-9785 Pin (10), a 5P-0372 Lock Pin (36), and a 8T-4121 Hard Washer (46) in order to attach the link. See Illustration 9.

   2. Attach the head end of the cylinder to the quick coupler. Use a 8L-5188 Pin (45), two 9T-7303 Spacers (59), and a 3B-4628 Cotter Pin (33) in order to attach the cylinder. See Section A-A of Illustration 9.

Installation of the Solenoid Valve and Valve Fittings

Note: Check all fittings prior to installation in order to ensure that O-ring seals have been installed.

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Illustration 10	g01294886
(C1) Port (C2) Port (P) Port (T) Port (19) 291-0010 Solenoid Valve and Mounting Gp (26) 148-8336 Connector As (27) 148-8378 Elbow As

1. Prepare the 291-0010 Solenoid Valve and Mounting Gp by installing one 148-8378 Elbow As (27) at Ports P and T. Then install one 148-3368 Connector As (26) at Ports C1 and C2. Orient elbows (27), as shown. See illustration 10.

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Illustration 11	g01382184
Solenoid valve and mounting View from bottom side of lift arm assembly crossmember (L) Lift arm assembly crossmember (19) 291-0010 Solenoid Valve and Mounting Gp (55) 8T-4224 Washers (56) 8T-6870 Bolts (61) 302-0389 Bracket As

2. Install the 291-0010 Solenoid Valve and Mounting Gp (27). Install 302-0389 Bracket As (61) to the bottom left side of the lift arm assembly crossmember (L). Use two 8T-6870 Bolts (56) and two 8T-4224 Washers (55). See illustration 11.

Fabrication of the Hydraulic Hoses

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Illustration 12	g01383005
The 302-0389 Bracket As has been removed for clarity. (23A) 258-2841 Hose Assembly (23B) 258-2841 Hose Assembly (63C) 207-9756 Hose Assembly (63D) 207-9756 Hose Assembly (63E) 207-9756 Hose Assembly (63F) 207-9756 Hose Assembly (GG) Hydraulic Hose Assembly (HH) Hydraulic Hose Assembly

Note: The following steps will require the assembly of hydraulic hoses. This kit contains the following items for assembling hydraulic hoses: bulk hydraulic hose and permanent couplings. Ensure that the correct permanent couplings are installed on the hoses during the assembly process.

1. Match your machine to the correct hose length that is listed in table 3 and table 3.

   Follow the procedures for fabrication of the hoses in step 2 and step 3.

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   Table 2

   Hose (GG)
   Part Number	Sales Model	Hose Length (Q)
   258-3918	287C	3210 mm (126.38 inch)
   258-3920	297C	3390 mm (133.46 inch)
   258-3918	262C	3210 mm (126.38 inch)
   258-3920	272C	3390 mm (133.46 inch)

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   Table 3

   Hose (HH)
   Part Number	Sales Model	Hose Length (R)
   258-3917	287C	3570 mm (140.55 inch)
   258-3919	297C	3830 mm (150.79 inch)
   258-3917	262C	3570 mm (140.55 inch)
   258-3919	272C	3830 mm (150.79 inch)

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Illustration 13	g01383005
The 302-0389 Bracket As has been removed for clarity. (23A) 258-2841 Hose Assembly (23B) 258-2841 Hose Assembly (63C) 207-9756 Hose Assembly (63D) 207-9756 Hose Assembly (63E) 207-9756 Hose Assembly (63F) 207-9756 Hose Assembly (GG) Hydraulic Hose Assembly (HH) Hydraulic Hose Assembly

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Illustration 14	g01294912
(GG) Hydraulic Hose Assembly (HH) Hydraulic Hose Assembly (20) 124-2113 Permanent Coupling (22) 124-2140 Permanent Coupling (31) 242-9532 Coupling As (38) 5P-4116 Hard Washer

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Illustration 15	g01383020
Hydraulic Hose Assembly (GG) (Q) Hydraulic Hose Length (20) 124-2113 Permanent Coupling (31) 242-9532 Coupling As (62) 213-8708 Hydraulic Hose

2. Use a hose cutoff machine in order to cut the correct length of 213-8708 Hose (62) for your machine. See table 3.

   Assemble one 242-9532 Permanent Coupling (31) on one end of the hydraulic hose. Assemble one 124-2129 Permanent Coupling (20) on the opposite end of the hydraulic hose. Refer to Illustrations 14 and Illustration 15.

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Illustration 16	g01383027
Hydraulic Hose Assembly (HH) (R) Hydraulic Hose Length (22) 124-2140 Permanent Coupling (31) 242-9532 Coupling As (62) 213-8708 Hydraulic Hose

3. Use a hose cutoff machine in order to cut the correct length of 213-8708 Hose (62) for your machine. See table 3.

   Assemble one 242-9532 Permanent Coupling (31) on one end of the hydraulic hose. Assemble one 124-2140 Permanent Coupling (22) on the opposite end of the hydraulic hose. Refer to Illustration 14 and Illustration 16.

Installation of the Lines Group

Note: Check all fittings prior to installation in order to ensure that O-ring seals have been installed.

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Illustration 17	g01386116
(23A) 258-2841 Hose As (23B) 258-2841 Hose As (63C) 207-9756 Hose As (63D) 207-9756 Hose As (63E) 207-9756 Hose As (63F) 207-9756 Hose As (9) 207-9737 Bracket (28) 150-4034 Tees (39) 6V-9168 Nuts (44) 7X-7729 Washer (49) 8T-4136 Bolts

1. Install the 207-9737 Bracket (9) on the top of the coupler. Use two 8T-4136 Bolts (49) and two 7X-7729 Washers (44). See Illustration 21.

2. Install the two 150-4034 Tees (28) on bracket (7) by using two 6V-9168 Nuts (39) to secure each tee.

   Torque the nuts to 55 ± 5 N·m (41.0 ± 4.0 lb ft).

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Illustration 18	g01386128
View from front of machine Some items are removed for clarity. (23A) 258-2841 Hose As (23B) 258-2841 Hose As (63C) 207-9756 Hose As (63D) 207-9756 Hose As (63E) 207-9756 Hose As (63F) 207-9756 Hose As (7) 192-2640 Coupler Cylinder Gp (19) 291-0010 Solenoid Valve and Mounting Gp (25) 148-8325 Connector As (28) 150-4034 Tees

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Illustration 19	g01301100
(7) 192-2640 Coupler Cylinder Gp (25) 148-8325 Connector As

3. Install two 148-8325 Connector As (25) into the ports on each of the 192-2640 Coupler Cylinder Gp (7) .

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Illustration 20	g01386131
(63C) 207-9756 Hose As (63D) 207-9756 Hose As (63E) 207-9756 Hose As (63F) 207-9756 Hose As (7) 192-2640 Coupler Cylinder Groups (28A) 150-4034 Tees (28B) 150-4034 Tees

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Illustration 21	g01383080
(E) 17° ± 5° Angle (F) 90° ± 5° Angle

4. Attach the 90° couplings of the four 207-9756 Hose As (63C), (63D), (63E), and (63F) to the four 148-8325 Connector As (25). Refer to Illustration 18 and Illustration 21 for the correct orientation of the hydraulic hoses.

   Note: Align the hose assemblies at the angles that are specified in illustration 21.

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Illustration 22	g01383084
View from front of machine (63C) 207-9756 Hose As (63D) 207-9756 Hose As (63E) 207-9756 Hose As (63F) 207-9756 Hose As (25) 148-8325 Connector As (28A) 150-4034 Tees (28B) 150-4034 Tees

5. Install the straight couplings of hoses (63F) and (63C) to 150-4034 Tee Assembly (28B). See illustration 22 for the correct orientation of the hydraulic hoses.

6. Install the straight couplings of hoses (63E) and (63D) to 150-4034 Tee Assembly (28A). See illustration 22 for the correct orientation of the hydraulic hoses.

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Illustration 23	g01383102
View from front of machine (23A) 258-2841 Hose As (23B) 258-2841 Hose As (C1) Port (C2) Port (W) 3S-2093 Cable Strap (19) 291-0010 Solenoid Valve and Mounting Gp (26) 148-8336 Connector As (28A) 150-4034 Tees (28B) 150-4034 Tees (46) 8T-4121 Hard Washer (50) 8T-4137 Bolt (57) 9M-8406 Clips (61) 302-0389 Bracket As

7. Attach the 90° coupling of hose (23A) to the bottom of 150-4034 Tee (28A). Attach the 90° coupling of hose (23B) to the bottom of 150-4034 Tee (28B). Refer to Illustration 22 and Illustration 23 for the correct orientation of the hydraulic hoses.

8. Install the straight coupling of hose (23A) onto 148-3368 Connector As (26). The connector is located at port (C2) on the 291-0010 Solenoid Valve and Mounting Gp (19). Install the straight coupling of hose (23B) onto 148-3368 Connector As (26). The connector is located at port (C1) on the 291-0010 Solenoid Valve and Mounting Gp (19). Refer to Illustration 22 and Illustration 23 for the correct orientation of the hydraulic hoses.

9. Install two 9M-8406 Clips (57) onto hoses (23A) and (23B). Locate the clips to the 302-0389 Bracket As (61). Use one 8T-4121 Hard Washer (46) and one 8T-4137 Bolt (50) for each hydraulic hose in order to secure the hoses to the 302-0389 Bracket As (61). See illustration 23 for the correct orientation of the clip.

10. Install one 3S-2093 Cable Strap (W) over hydraulic hoses (23A) and (23B). Possible damage from pinching is avoided by securing the hoses together. See illustration 23 for the correct location of the strap.

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Illustration 24	g01383117
(23A) 258-2841 Hose As (23B) 258-2841 Hose As (2) 124-2456 Film (9) 207-9737 Bracket As (11) 212-6690 Guard (41) 7G-2950 Clip (42) 7G-2951 Clip (44) 7X-7729 Washer (49) 8T-4136 Bolt (51) 8T-4189 Bolt (55) 8T-4224 Hard Washer

11. Install one 7G-2950 Clip (41) and one 7G-2951 Clip (42) onto hoses (23A) and (23B). Align assembled clips to the existing boss. Then, install one 7X-7729 Washer and one 8T-4136 Bolt in order to secure hoses. Refer to Illustrations 16 and Illustration 24.

12. Install the 212-6690 Guard (11) over the 207-9737 Bracket As (9). Use one 8T-4224 Hard Washer (55) and one 8T-4224 Hard Washer in order to secure the guard to the bracket. Refer to Illustrations 16 and Illustration 24.

    Apply the 124-2456 Film (2) to the 212-6690 Guard (11) .

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Illustration 25	g01297030
(GG) Hydraulic Hose Assembly (HH) Hydraulic Hose Assembly (15) 258-2193 Tube As (16) 258-2194 Tube As (17) 258-4191 Work Tool Harness As (21) 164-4225 Clip (24) 132-7551 Spacer (32) 266-3315 Bolts (35) 4D-6466 Clips (37) 5P-4116 Hard Washer (40) 7B-1597 Clip (43) 7H-7055 Clip (47) 8T-4121 Hard Washer (52) 8T-4191 Bolt (54) 8T-4200 Bolt (58) 9S-1350 Clip

13. Position 258-2193 Tube As (15) and 258-2194 Tube As (16) along the right lift arm. See Illustration 25.

    Use two 7B-1597 Clips (40), two 9S-1350 Clips (58), one 5P-4116 Hard Washer (37), and one 8T-4200 Bolt (49) in order to fasten the two tube assemblies to the right lift arm. See Illustration 25.

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Illustration 26	g01383147
View of the bottom of lift arm crossmember (P) Port (T) Port (15) 258-2193 Tube As (16) 258-2194 Tube As (19) 291-0010 Solenoid Valve and Mounting Gp (27) 148-8378 Elbow As (43) 7H-7055 Clip (46) 8T-4121 Hard Washer (52) 8T-4191 Bolt

14. Place one 7H-7055 Clip (43) onto tube assembly (15). Place one 7H-7055 Clip (43) onto tube assembly (16). See Illustration 26.

    Align the clips to the existing boss that is located under the lift arm crossmember. Fasten the clips with one 8T-4191 Bolt (52) and one 8T-4121 Hard Washer (46) .

    Note: Leave the clips loose until the tube fittings are connected to the 291-0010 Solenoid Valve and Mounting Gp (19) .

15. Attach the 258-2193 Tube As (15) to the 148-8378 Connector As (27) that is located at port (P) on the 291-0010 Solenoid Valve and Mounting Gp (19) .

16. Attach the 258-2194 Tube As (16) to the 148-8378 Connector As (27) that is located at port (T) on the 291-0010 Solenoid Valve and Mounting Gp (19) .

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Illustration 27	g01297599
(GG) 258-3367 Hose (HH) 258-3366 Hose (15) 258-2193 Tube As (16) 258-2194 Tube As (21) 164-4225 Clip (24) 132-7551 Spacer (32) 266-3315 Bolt (35) 4D-6466 Clip (38) 6V-8397 O-Ring Seal

Note: Mark each hydraulic hose along the length of the hose in order to ensure the correct hydraulic hose connections.

Note: Connect both ends of the hydraulic hoses before you tighten the hydraulic hose clips. This procedure will ensure proper orientation of the hydraulic hoses .

Note: Refer to Step 2 and Step 3 for the correct hydraulic hose length for your machine.

17. Connect hydraulic hose (GG) with a 6V-8397 O-Ring Seal (38) to the 258-2194 Tube As (16) .

18. Connect hydraulic hose (HH) with a 6V-8397 O-Ring Seal (38) to the 258-2193 Tube As (15) .

19. Route the two hoses (GG) and (HH) through the top access hole in the right side of the engine compartment and into the right tower. See Illustration 27.

20. Attach one 164-4225 Clip (21) to hose (GG) and attach the clip to the existing boss. See Illustration 27 for the location of the clips.

21. Attach one 164-4225 Clip (21) to hose (HH) and attach the clip to the existing boss. See Illustration 27 for the location of the clips .

22. Attach one 4D-6466 Clip (35) to hoses (GG) and (HH). Use the existing hardware in order to fasten the hoses to the upper section of the tower. See Illustration 27 for the location of the clip.

23. Attach one 4D-6466 Clip (35) to hoses (GG) and (HH). Then, use one 132-7551 Spacer (24) and one 266-3315 Bolt (32) in order to fasten the hoses to the middle section of the tower. See Illustration 27 for the location of the clip.

    Tighten the connector clip bolt to a torque of 25 ± 5 N·m (18 ± 4 lb ft).

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Illustration 28	g01386640
(GG) 258-3367 Hose As (HH) 258-3366 Hose As (R) 258-2689 Hose As (S) 258-3507 Tube As (29) 212-1336 Tee As (30) 215-3191 Reducer As (32) 266-3315 Bolt (35) 4D-6466 Clip (60) 9X-6581 Nut

24. Locate the existing 282-2689 Hose As (R) which is connected between the fan motor and the gear pump. At the gear pump, disconnect the hose assembly from the fitting and remove the 90° fitting from the gear pump. See Illustration 28.

25. Install the 9X-6581 Nut (60) on the 212-1336 Tee As (29). Install the 212-1336 Tee As (29) into the port of the gear pump. Reconnect hose (R) to the bottom side of the 212-1336 Tee As (29). Tighten the 9X-6581 Nut (60) so that the nut seats against the pump. See Illustration 28.

26. Connect the 215-3191 Reducer As (30) to the 212-1336 Tee As . Connect hose (HH) to the 215-3191 Reducer As (30). See Illustration 28.

27. Attach one 4D-6466 Clip (35) to hose (GG) and (HH). Then, use one 266-3315 Bolt (32) in order to fasten the hoses to the frame. Refer to Illustration 25 and Illustration 28 for the location of the clips.

    Tighten the connector clip bolt to a torque of 25 ± 5 N·m (18 ± 4 lb ft).

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Illustration 29	g01386847
(GG) 258-3367 Hose As (S) 258-3507 Tube As

28. Locate the 258-3507 Tube As (S). Remove the cap. Then, connect the 258-3367 Hose As (GG) to the welded connection that is located on 258-3507 Tube As (S). Refer to Illustration 28 and Illustration 29.

29. Route the 258-4191 Work Tool Harness As (17) along the previously installed tube assemblies. Secure the 258-4191 Work Tool Harness As to the tube assemblies with 7K-1181 Cable Straps . See illustration 25.

30. Locate the unused 3-pin plug (PA-C11) that is on the 258-4108 Platform Harness As on the right side of the engine compartment.

    Note: Ensure that the wiring for the 3-pin connector plug matches the configuration in Table 4.

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    Table 4

    3-Pin Plug
    Pin	Color	Wire Number
    A	WH	779
    B	PU	780
    C	BU	K927

31. Insert the 3-pin plug into the 3-pin connector receptacle for the solenoid for the 291-0010 Solenoid Valve and Mounting Gp (19) .

Installing the Switch

1. Install rocker switch (18) in the left control panel per Step 1.a through Step 1.d.
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   Illustration 30	g01297927
   Control panel (T) 258-4007 Switch Cover

   1. Locate switch cover (T) on the left-hand side of the control panel. See Illustration 30.

      Note: Switch cover (T) has provisions for four rocker switches. Use a thin blade screwdriver in order to release the locking tab on one side of the switch cover. Then, withdraw the switch cover from the panel.

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   Illustration 31	g01298155
   (18) 265-9513 Rocker Switch (T) 258-4007 Switch Cover

   2. Remove the plug from the switch cover.

      Note: Remove the plug by pushing the plug from the back of the switch cover.

      Then, install rocker switch (18) in the switch cover. See Illustration 31.

      Note: Install the rocker switch by pushing the rocker switch into the opening in the switch cover. Insert the rocker switch from the front of the switch cover. Push the rocker switch until the locking tabs on the rocker switch are engaged.

   3. Locate harness connector L-C11 on the 258-4101 Panel Harness As that is inside the Control Panel. Connect the harness connector to the back of the rocker switch.

      Note: Ensure that the configuration of the harness connector matches the configuration that is provided in Table 5.

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      Table 5

      Connector L-C23
      Position	Color	Wire Name
      1	White	779-L28
      2	Yellow	117-L21
      3	Purple	780-L27
      4	Blue	K927-L24
      5	Black	200-L22
      6	Blue	K927-L25

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   Illustration 32	g01297930
   (18) 265-9513 Rocker Switch (T) 258-4007 Switch Cover

   4. Reinstall switch cover (T) with switch (18) into the Control Panel.

Operation of Work Tool Coupler Control

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Improper attachment of work tools could result in injury or death. Do not operate this machine until you have positive indication that the coupler pins are fully engaged. Check for engagement by: Tilt the work tool down. Put down pressure on the work tool. Back the machine up and make sure that the coupler pins do not disengage from the work tool.

Illustration 33	g01302142

To disengage the coupler pins, push the red button (U) upward and press the BOTTOM of the switch. Hold the switch in the down position until the coupler pins disengage.

To engage the coupler pins, press the TOP (V) of the switch and hold the TOP (V) of the switch until the coupler pins engage.

Note: If the coupler pins will not engage at low idle engine speed, repeat the procedure with the machine in high idle.

Note: Refer to the Operations and Maintenance Manual for more information on the operation of the work tool coupler control.

Service Parts