CYLINDER & VALVE GP-LIFT 1171708 - Caterpillar

Removal Procedure
Start By:
Remove the valve mechanism cover. Refer to Disassembly and Assembly, "Valve Mechanism Cover - Remove and Install".
Illustration 1 g01456407
Disconnect harness assembly (3).
Remove bolts (1) and remove compression brake (2). Installation Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A 1U-7234 Feeler Gauge 1
Adjust the engine valve lash. Refer to Testing and Adjusting, "Engine Valve Lash - Inspect/Adjust".
Illustration 2 g01456442
Loosen mounting nuts (4) that hold down the harness assembly to give the compression brake more clearance during installation.
Illustration 3 g01456445Note: Check the O-ring seals for wear or for damage. Replace the components, if necessary.
Lubricate the O-ring seal (5) that is found on compression brake (2) sparingly with clean engine oil.
Illustration 4 g01456407
Illustration 5 g01363691
Torque Sequence
Position compression brake (2).
Connect harness assembly (3) and install bolts (1) finger tight.
Tighten bolts (1) to a torque of 55 10 N m (41 7 lb ft) in the above sequence.
Illustration 6 g01456443
Tighten mounting nuts (4) that hold down the harness assembly.
Illustration 7 g01457661
Illustration 8 g01456446Note: Failure to adjust lash properly could result in engine damage.
Set the brake lash for the compression brake on cylinders one, three and five. Position the number one piston to the top center position of compression stroke. Refer to Testing and Adjusting, "Finding Top Center Position for No. 1 Piston".
Thread adjuster (7) clockwise until the brake piston (8) touches valve bridge (9).
Turn adjuster (7) counterclockwise until the adjuster has turned one full rotation.
Use Tooling (A) in order to verify the brake lash of 0.9 0.2 mm (0.035 0.008 inch). The brake lash is measured between brake piston (8) and valve bridge (9).
Tighten the locknut (6) to a torque of 50 10 N m (37 7 lb ft). Do not allow the adjustment screw to turn while you are tightening the adjustment locknut. Recheck the valve lash after tightening the adjustment locknut.
Illustration 9 g01457661
Illustration 10 g01456446Note: Failure to adjust lash properly could result in engine damage.
On cylinders two, four, and six, set the lash on the compression brake. Position the number six piston to the top center position of compression stroke.
Thread adjuster (7) clockwise until the brake piston (8) touches valve bridge (9).
Turn adjuster (7) counterclockwise until the adjuster has turned one full rotation.
Use Tooling (A) in order to verify the brake lash of 0.9 0.2 mm (0.035 0.008 inch). The brake lash is measured between brake piston (8) and valve bridge (9).
Tighten locknuts (6) to a torque of 50 10 N m (37 7 lb ft). Do not allow adjuster (7) to turn while you are tightening locknut (6). Recheck the valve lash after tightening the locknut.