Lubricating Oil/Cooling Water Thermostat
Maintenance / Checking
A5.05. 11.06.01.00
7500
M20-M601C
en / 31.05.2000 IB021739 1/2
11
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 and functional check of the thermostatic
element of the lubricating oil/cooling water thermostat every 7,500 h
Note:
The thermostatic elements 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 (1) and turn set nut (2) clockwisely in order to get a lower
temperature. After setting counter again.
The cooling line is fully opened and the bypass closed when the control pin (3) is in the upper
position.
This setting procedure may only be carried out if the thermostat fails.
With mounting a new thermostat, the control pin (3) must be set to its initial position by the nut (2).
Sequence of operations:
1. Disassembly (Fig. 1)
1.1 Drain lubricating oil/cooling water lines.
1.2 Unscrew nuts (5) of housing lower part (6)
and remove housing cover.
1.3 Unscrew counter nut (1) from regulating
spindle.
1.4 Remove thermostatic element out of hou-
sing lower part.
1.5 Wash parts in gas oil and blow them clean.
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