Bobcat 741 - Page 311

VALVES
Removal
The tool listed will be needed to do the following
procedure:
MEL 1296 -
Valve Stem Seal Installation
Remove the cylinder head from the engine block. (See
Page
7D-31 .)
Mark the
valves so they will be returned to their original
position when assembled.
Remove the valve spring locks, using a spring
compressor [A).
Remove the spring retainer, spring, spring seat and
valve
[A].
Remove the valve stem seals with a plier and discard [B] .
Before
reassembly, check the valves, valve seats and
guides.
Installation
Make sure the cylinder head is clean.
Install
the spring seal on the valve guide. Use the special
tool, install the valve stem seal into position. DO NOT turn
the
seal when installing it.
The
seal is installed in the specified position by the special
tool. Incorrect installation
of the seal will affect the seal lip
1.0 . and eccentricity, resulting in oil leakage down the
valve guide.
Put oil on the valve stems and install. Install the valve
springs and spring retainer. Use a spring compressor and
install the valve spring locks.
Tap the valve stem with a hammer a small amount to seal
the valve stem locks [C).
Added Sept. 90
A
1.
2.
3.
4.
5.
6.
7.
-70-33-
1-~
2-~
4-l!l
5- 1
Valve Stem Lock
Retainer
Seal (Intake)
Seal
(Exhaust)
Spring
Spring Seat
Guide (Intake)
8. Guide (Exhaust)
9. Cylinder Head
10. Exhaust Seal
11. Intake Seat
12.
Exhaust Valve
13.
Intake Valve
B-09774
741 , 742, 743, 7430S Bobcat Loader
Service Manual