GUARD AS 2612042 - Caterpillar

start by: a) remove cylinder head 1. Install cylinder head (1) on tooling (A) as shown. 2. Put identification on the valves and head for correct assembly. Use tooling (B) as shown to put valve spring (4) under compression. Remove three locks (3). Slowly release compression from the valve spring and remove tooling (B). Remove retainer (2), two springs (4), rotator, spacer and valve from the head.3. Do Steps 1 and 2 again for the remainder of valves.Install Valves
1. Check spring force with tool (B). For the correct spring force, see the subject VALVES in SPECIFICATIONS. 2. Inspect and make a replacement, if necessary, of the O-ring seals in the inlet valve retainers. Put the valves, spacer, rotator, springs and retainer in position on the head. Put the springs under compression with tool (C). Install three locks (1). The thick end of the lock goes toward the cylinder head.
Locks can be thrown from the valve when tool (C) is released if they are not in their correct position on the valve stem.
3. Remove tool (C) slowly. Hit the valve lightly with a soft hammer to be sure the locks are in their correct position.4. Do Steps 1 through 3 again for the remainder of the valves.end by: a) install cylinder head