Lubricating Oil/Cooling Water Thermostat
Maintenance / Checking
A5.05. 11.06.01.01
7500
M20-M601C
en / 31.05.2000 IB021750 1/2
11
Ĺ
See also:
Spare parts list: B1.05.11.1.7837
Time requirement: 1 Pers./ 1,00 h
Personnel qualification: skilled engine hand
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Operating medium: Heavy fuel and distillate fuel
Maintenance:
Disassembly of lubricating oil/cooling water thermostat,
making a funcional check of thermostatic element every 7,500 h
Note:
The thermostatic elements (Fig. 1/5) are adjusted by the manufacturer to the required
temperature. Modification of the adjustment or repair is impossible. Defective elements
must be exchanged completely.
Controlling the thermostatic elements in case of failure is enabled by a manual control
facility. Hereto slacken counter nut (3) and turn set screw (4) clockwisely in order to get
a lower temperature. After setting counter again.
The cooling line is fully opened and the bypass closed when the set screw (4) flushes
with the surface of the counternut (3).
This setting procedure may only be carried out if the thermostat fails.
With mounting a new thermostat, the set screw (4) must be set to its initial position by
the nut (3).
Sequence of operations:
1. Disassembly
1.1 Drain lubricating oil/cooling water lines.
1.2 Unscrew hexagon nuts (2) of housing
cover (6).
1.3 Remove cover (6) with O-ring (1).
1.4 Turn out thermostatic element (5)
from valve housing (7).
1.5 Wash parts in gas oil and blow them
clean.
1.6 Wipe clean thermostat housing with
lint-free cloth and check for corrosion
and deposits.
4
3
2
1
5
9
8
•
•
6
7
XX
Fig. 1
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