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Cat 259D Valve Cover Gasket Replacement

millerdj65

Member
Joined
Oct 21, 2025
Messages
6
Location
Pennsylvania
I am about to replace the valve cover gasket on a 2018 Cat 259D. I was looking to see if anyone had the instructions from the service manual for this replacement? Or any tips that would be helpful. Thanks in advance.
 

Deimos

Well-Known Member
Joined
Nov 8, 2024
Messages
222
Location
RUS
259D Compact Track Loader FTL00001-UP (MACHINE) POWERED BY C3.3B Engine(SEBP5971 - 101) - Documentation

Valve Mechanism Cover - Remove and Install​

SMCS - 1107-010


Removal Procedure​


Start By:

a. Remove the glow plugs.
b. Remove the fuel injection lines.

Note: Refer to Specification UENR3421 "Engine Design" for non-specified engine Torque Values.

1778873915907.png


  1. Remove bolts (1) to remove brackets.

  2. Disconnect hose assemblies (2) and (3).

1778873960479.png



3. Remove bolts (4).

4. Remove valve mechanism cover (5).

5. If necessary, remove O-ring seal in valve mechanism cover (5) and replace with new.


Installation Procedure​


  1. Install valve mechanism cover (5) in the reverse order of removal. Tighten bolts (4) to a torque of 10 to 11 N·m (87 to 100 lb in).
 
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