Remachining Basic Bore For Valve Seat Rings - Mercedes-Benz Unimog 435 Service Manual

Remachining basic bore
Clamp tool in slide rest.
2 Introduce pilot into
valve
guide until stop on
slotted rod rests on
valve
guide. If necessary, force
slotted rod downwards using screwdriver. Tighten
with drift, introducing into pilot from
above
and be-
low.
3 Release lock-nut
(1),
moisten pilot with oil, slip
cutter
over
pilot, turn quick·action adjusting screw
(2) until tool
moves
horizontally beyond bore, and
then slide cutter downwards until tool rests on cy-
linder head.
Important:
Fit tools carefully so as not to damage carbide tip.
4 Release locking screw (1), force pilot support
(2) downwards until it contacts pilot, and then re-
tighten locking screw (1).
S Turning the knurled collar serves to adjust tool
height to point where it is just clear.
6 Lock floating guide horizontally with aid of
steady clamp, making sure to set working depth be·
tween adjusting ring and floating guide.
See 1.2/4 for working depth.
UKD 30 402 21 424)1
Remachining basic bore for valve seat rings
01.8
352/352
A
6.5/1.