B - Ardiehl.de

VALVES, VALVE SEAT AND GUIDE
Removal
The tools listed will be needed to do the following
procedure:
MEL1266 – Valve Stem Seal Installer
Mark the valves and parts so they are returned to their
original position when assembling.
Remove the valve spring locks [A], using a spring
compressor [B].
Remove the valve springs, spring seats, oil seal and valve
[A].
Before reassembly, check the valves, valve seats and
guides.
Installation
Make sure the head is clean.
Put oil on the valve guides and valve stems.
Put each valve in the correct location.
Install the valve springs, spring seats and oil seals [A].
NOTE: Install the valve springs with their closed
pitched (painted side) end toward the
cylinder head.
Use a valve spring compressor and install the valve
spring locks.
Tap the valve stem with a hammer a small amount to seat
the valve stem locks.
Reconditioning the Valve and Valve Seats
Use the correct equipment to grind the valve and valve
seats.
The angle of the intake and exhaust valves is 45° [C].
The valve head thickness is as listed [C]:
Standard – 0.071 inch (1,8 mm)
Limit – 0.059 inch (1,5 mm)
A
1. Spring Seat
2. Springs
3. Valve
4. Oil Seal
5. Spring Seat
B
C
5
Thickness
4
4
1
2
B–08192
B–08193
45°
B–08202
853, 853H BICS Loader
–7–51– Service Manual