New Bolts and Spacers are Now Used to Mount the Transmission Control Manifold on Certain K and K 2 Series Motor Graders {3073, 3167} Caterpillar

New Bolts and Spacers are Now Used to Mount the Transmission Control Manifold on Certain K and K 2 Series Motor Graders {3073, 3167}

Usage:

120K JAP

Motor Grader: 120K (S/N: SZN1486-2497; JAP3120-6859,6862-6862); 120K Series 2 (S/N: SZS489-1002; SZZ106-204); 12K (S/N: JJA3012-3227; SZP360-736); 140K (S/N: JPA3140-4003,4005-4014,4016-4016,4023-4023; SZL1869-3899,3904-3905,3907-3907); 140K Series 2 (S/N: SZW159-193); 160K (S/N: SZM490-600; JBP153-153)

Description Of Change: New bolts and spacers are now used to mount the transmission control manifold on certain K and K 2 series Motor Graders. The new bolts and spacers provide improved torque retention and ensure proper manifold sealing to the transmission.

Adaptable To: For part and installation information, see "Rework Procedure" below.

The new 8T-7329 Bolts and 503-6251 Spacers are adaptable to all machines within the listed serial numbers.

The new bolts and spacers are effective in production on all machines after the listed serial numbers.

Rework Procedure

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Table 1
Required Parts
Item	Qty.	Part Number	Part Name
1⁽¹⁾	1	2P-1692	O-Ring Seal
2⁽¹⁾	1	6D-0692	O-Ring Seal
3	12	8T-7329	Bolt
4	12	503-6251	Spacer
5⁽¹⁾	8	423-6535	Solenoid Valve Gp

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⁽¹⁾	Replace as needed.

Note: For this procedure, the assumption is made that the control manifold is already removed from the transmission and part locations were noted prior to removal.

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Illustration 1	g06115730
View of control valve manifold and relief valve seals.

Inspect the control valve manifold seal (2) and the relief valve (1) seal. Replace the seals as needed.
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Illustration 2 g06115737

Original washers are reused with the new bolts and spacers.
The new 8T-7329 Bolts and 503-6251 Spacers are assembled with the original washers (A) on each side of the spacer.
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Illustration 3 g06115748

New bolt and spacer locations are shown.
Install and hand tighten the two center mounting bolts (B) to hold the control valve while all other bolts are installed.
The locations for the 12 new bolts with spacers are shown in illustration 3.
Hand tighten all bolts.
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Illustration 4 g06115768

Torque sequence for control valve manifold.
Torque the control valve body to the transmission following the sequence shown in illustration 4.
Torque all mounting bolts in this step to 30 ± 4 N·m (22 ± 3 lb ft).
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Illustration 5 g06115780

Main relief valve and solenoid valves are shown.
Install the main relief valve.
Torque main relief valve mounting bolts to 30 ± 4 N·m (22 ± 3 lb ft).
Install the solenoid valves (5) into the original locations. Inspect and lubricate the O-ring seals before assembly. Transmission oil may be used as lubricant.
Note: Contamination from any debris in the transmission oil is cause for solenoid valve replacement.
Torque solenoid bolts to 3.7 ± 0.8 N·m (33 ± 7 lb in).
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Illustration 6 g06115793

Harness securing locations are shown.
Reattach the wiring harness. Reinstall any clips previously removed with the harness. Plug the harness into the appropriate sensor or solenoid sockets.
Torque all clip mounting bolts to 15 ± 3 N·m (11 ± 2 lb ft).