PRODUCT SUPPORT PROGRAM FOR REWORKING SPOOL SPRINGS ON CERTAIN ON 307D AND 307E EXCAVATORS Caterpillar
PRODUCT SUPPORT PROGRAM FOR REWORKING SPOOL SPRINGS ON CERTAIN ON 307D AND 307E EXCAVATORS
Usage:
REBE9723-01
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16May2013
(Revised 23May2013)
D-173
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Before/After
PRODUCT SUPPORT PROGRAM FOR REWORKING SPOOL SPRINGS ON CERTAIN ON 307D AND 307E EXCAVATORS
1108 6262 5051
PS43911
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NOTE:
This Program must be administered either before or after failure.
In either case the decision whether to apply the Program is made by the dealer. When reporting the repair, use "PS43911" as the Part Number
and "7755" as the Group Number. If administered before failure, use "56" as the Warranty Claim Description Code and "T" as the SIMS Description code.
If administered after failure, use "96" as the Warranty Claim Description Code, and "Z" as the SIMS Description Code.
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NOTE:
The information supplied in this service letter may not be valid after the termination date of this program.
Do not perform the work outlined in this Service Letter after the termination date without first contacting your Caterpillar product analyst.
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NOTE:
This Revised Service Letter replaces the 16May2013 Service Letter. Changes have been made to the Service Claim Allowances in order to cover hydraulic oil.
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TERMINATION DATE
31May2014
PROBLEM
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The existing main valve spool springs can fail on certain 307D and 307E Excavators. If the existing spool springs fail, it may cause unintended movement.
In order to allow equitable parts availability to all participating dealers, please limit your initial parts order to not exceed 32% of dealership population. This is an initial order recommendation only, and the ultimate responsibility for ordering the total number of parts needed to satisfy the program lies with the dealer.
In order to allow equitable parts availability to all participating dealers, please limit your initial parts order to not exceed 32% of dealership population. This is an initial order recommendation only, and the ultimate responsibility for ordering the total number of parts needed to satisfy the program lies with the dealer.
ACTION REQUIRED
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Refer to the attached Rework Procedure.
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SERVICE CLAIM ALLOWANCES
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Product smu/age whichever comes first
Caterpillar
Dealer Suggested
Customer Suggested
Parts %
Labor Hrs%
Parts %
Labor Hrs%
Parts %
Labor Hrs%
*******Group 1*******
0-1500 hrs, 0-12 mo
100.0%
100.0%
0.0%
0.0%
0.0%
0.0%
NOTE: This is a 2.0-hour job for Group 1
$25 will be allowed for bulk hydraulic oil.
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Product smu/age whichever comes first
Caterpillar
Dealer Suggested
Customer Suggested
Parts %
Labor Hrs%
Parts %
Labor Hrs%
Parts %
Labor Hrs%
*******Group 2*******
0-1500 hrs, 0-12 mo
100.0%
100.0%
0.0%
0.0%
0.0%
0.0%
NOTE: This is a 2.0-hour job for Group 2
$25 will be allowed for bulk hydraulic oil.
PARTS DISPOSITION
Handle the parts in accordance with your Warranty Bulletin on warranty parts handling.
Rework Procedure
This spool spring replacement Rework Procedure will be serving for both the 307D 373-7026 Hydraulic Valve Block and the 307E 397-6188 Hydraulic Valve Block.
Note: The 307E will have an additional blade spool spring for replacement.
The 307E blade spool spring will be classified under Non-Regen Spool sections.
For the 307D, refer to the 373-7026 Main Hydraulic Valve Block spool section in Image1.2.1 and shown below:
Aux Spool Section = A Stick Spool Section = B Bucket Spool Section = C LH Travel Spool Section = D RH Travel Spool Section = E Boom Spool Section = F Swing Spool Section = G
Image1.2.1
For the 307E, refer to the 397-6188 Main Hydraulic Valve block spool section in Image1.3.1 and shown below:
Aux Spool Section = A Blade Spool Section = H Stick Spool Section = B Bucket Spool Section = C LH Travel Spool Section = D RH Travel Spool Section = E Boom Spool Section = F Swing Spool Section = G
Image1.3.1
The following steps are for the 307E only.
1. Unbolt top fitting A, the spanner size is 50mm (92.5 N.m).
2. Unbolt bottom fitting B, the spanner size is 41mm (260 N.m).
Note: This will allow for additional space for the spool spring replacement.
3. After completion of the 307E spool spring replacement, tighten fitting A to a specified torque of 92.5 N.m.
4. After completion of the 307E spool spring replacement, tighten fitting B to a specified torque of 260 N.m.
Refer to Image1.4.1.
Image1.4.1
For the Non-Regen Spool sections, Swing, LH and RH Travel, Aux and Blade (307E only).
Refer Image1.5.1.
Image1.5.1
Image1.5.1
For the Re-Regen Spool sections, Boom, Stick, and Bucket only. Refer Image1.6.1.
Image1.6.1
1. Refer to RENR9744, Disassembly and Assembly, "System Pressure Release", in order to prepare the machine for this Rework Procedure. Refer Image1.7.1.
Image1.7.1
2. Remove two end cap screws (10 +/- 1 N.m) from the spool, using a M5 Allen drive. Retain the end cap screw washers for later reuse in this Rework Procedure. Refer to Image1.8.1.
Note: The two end cap screw washers are required for re-assembly.
Image1.8.1
3. Lightly pry the end cap from the valve body with a flathead screwdriver.
4. Remove the end cap. Refer Image1.9.1.
Image1.9.1
5. Slide the spool halfway out from the spool bore.
Note: Do NOT remove the spool from the bore.
6. Install the spool holder onto the spool. Refer to Image1.10.1. Use a grip clamp in order to clamp the spool holder.
Image1.10.1
7. Use a 6mm Allen drive (13.6 +/- 1.4 N.m) to unbolt the spool end. Loosen to remove the completed spring section.
8. Replace with a new spring and re-tighten the spool end to a specified torque of 13.6 +/- 1.4 N.m.
9. Remove the grip clamp and spool holder and slide the spool back into the spool bore. Refer Image1.11.1.
Image1.11.1
10. Check and ensure that there is one end cap O-Ring before installing the end cap. Ensure that it is in place.
11. Replace the 6V-5586 O-Ring if it is damaged or loose.
12. Assemble the end cap with screws and washers. Ensure that the surrounding area is clean.
13. Position the ridge of the end cap facing the workports.
14. Slightly turn down the end cap screws until the spool end cap screw is flush with the housing. Refer to Image1.12.1.
15. Tighten the end cap screws to a specified torque of 10 +/- 1 N.m.
Spool spring replacement is completed.
Image1.12.1
16. Repeat Steps 2-15 for the Swing, RH and LH Travel, Blade and Aux spools, for Non-Regen Sections only.
17. Similarly, for the Regen Sections, repeat Steps 2-4 for the end cap removal.
18. Slide the spool out from the spool bore and install a spool holder. Use a 6mm Allen drive (13.6 +/- 1.4 N.m) to unbolt the spool end while holding a 15mm open-end spanner onto the Regen spool adapter, in order to unbolt the spool end.
Note: The Regen spool adapter should stay in place, do NOT remove. If it loosens during the removal of the spool end, re-tighten the adapter to a specified torque of 13.6 +/- 1.4 N.m.
Refer Image 1.13.1.
Image1.13.1
19. Slowly unbolt the spool end and remove the spring section. Refer to Image1.14.1.
20. Replace with a new spring and re-tighten the spool end to a specified torque of 13.6 +/- 1.4 N.m.
21. Remove the grip clamp, spool holder, and the 15mm spanner. Slide the spool back into the spool bore.
22. Repeat Steps 10-15 for the end cap installation.
23. Tighten the end cap screws to a specified torque of 10 +/- 1 N.m.
Regen section spool spring replacement is completed.
24. Repeat Steps 17-23 for the Boom, Stick, and Bucket, for the Regen Sections only.
25. Fill the hydraulic oil if below the required level.
26. Start the engine and perform an air debleed in the hydraulic system.
27. Exercise and test run all implement functions for 15 minutes at high speed.
28. Observe and ensure that there are no leaks around the spool end caps.
29. Observe and ensure all implement function work as intended.
