Crankcase Explosion Relief Valves
Inspection / Checking
A5.05. 03.01.01.00
1500
M20/M282/M332C/M452/M453C/M551/M552C
en / 30.05.2000 IB021500 1/1
03
Ĺ
See also: 02.01.01.nn
Spare parts list: B1.05.03.n.1633
Time requirement: 1 Pers./ 0,50 h
Personnel qualification: skilled engine hand
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Operating medium: Heavy fuel and distillate fuel
Inspection:
Check the freedom of movement of the relief valves.
Auxiliary material:
Glue “Hymir 1000” and hardener *
Molykote paste “G-Rapid” *
* or a produkt of equal standard
Sequence of Operations:
1. Check the relief valve (2) from the
inside of the crankcase door (1) for
freedom of movement by actuating it
by hand.
2. If the valve ist not free on the guide
bolt (3), disassemble the valve.
3. Check the guide bolt and plate (4) and
touch them up if necessary.
4. Check the O-ring (6) on the guide bolt
and renew it if necessary.
5. When fitting a new O-ring, cover the
thread (M 12) portion of the bolt with a
smooth piece of sheet metal, cardboard
or similar.
6. Check the seal (5) of valve plate (4) and
renew it if necessary (fix it with
“Hymir 1000” and hardener). Coat the
shank of the bolt with Molykote paste
“G-Rapid”.
7. Assemble the relief valve, fit the split
pin and check the valve plate for free-
dom.
1
5
4
3
6
2
Fig. 1
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