MAK M 20 - Oil Pressure Control Valve; Maintenance

Oil pressure control valve
Maintenance / Adjust
A5.05. 08.05.01.00
15000
M20
en / 31.05.2010 IB024704 1/3
08
See also: 08.03.02.nn
Spare parts list: B1.05.08.2.6417
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 adjustment of the
oil pressure control valve every 15,000 h
Sequence of operations:
1. Disassembly
1.1 Loosen the cheese head screws (8) evenly to relieve the pressure spring (3).
1.2 Remove and dismantle the control valve (1).
1.2.1 Remove protective cap (30).
1.2.2 Loosen the hexagon nut (18) and completely unscrew the spindle (19) by turning it counter-
clockwise and remove it together with the ball (16).
1.2.3 Loosen the screw connection (17) and remove it together with the sealing ring (14) and bush (10).
1.2.4 Remove the locking ring (9) and take out the piston (11) with washer (15) and pressure spring
(13).
NOTE
Disassembly of the pressure control valve during the repair interval is only necessary
if the necessary lubricating oil pressure can no longer be set by adjusting the initial
tension of the spring. The lubricating oil pressure (see A1.05, engine data) is only
allowed to be adjusted at the nominal engine speed (A1.10) and at the specified lubri-
cating oil temperature (see A1.06).
WARNING
Pay attention to the tension of the pressure spring (Fig. 1/3) on the control valve (1)!
WARNING
Pay attention to the tension of the pressure spring (13) on the screwed connection
(17)!