MacDon M100 SP Operators Manual - Manual (Page 161)

MAINTENANCE/SERVICE
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Rev. C
3. Hold screw (D) with Allen wrench (E) and
loosen jam-nut (F).
4. Adjust screw as required.
5. Repeat checking and adjustment until relief
pressure is correct, then tighten jam-nut (E)
while holding screw (D). Replace cap (C).
f. If relief pressure does not increase after
adjusting two or three times, check relief valve
as follows:
1. Remove relief valve (B) from manifold.
2. Check that no contaminant is preventing the
spring-loaded poppet from properly seating
against the valve body.
3. Clean as required with a solvent type
cleaner and compressed air, and reinstall
valve.
4. Check all seals for integrity.
5. Reset adjustment screw to original position
before checking relief pressure.
g. Remove pressure gauge hose and reinstall cap
(A) to fitting.
57.9.7 Hoses and Lines
Check hydraulic hoses and lines daily for signs
of leaks.
WARNING
Avoid high-pressure fluids. Escaping fluid
can penetrate the skin causing serious
injury. Relieve pressure before
disconnecting hydraulic lines. Tighten all
connections before applying pressure. Keep
hands and body away from pin- holes and
nozzles which eject fluids under high
pressure.
If ANY fluid is injected into the skin, it must
be surgically removed within a few hours by
a doctor familiar with this type of injury or
gangrene may result. Use a piece of
cardboard or paper to search for leaks.
IMPORTANT
Keep hydraulic coupler tips and
connectors clean. Dust, dirt, water and
foreign material are the major causes of
hydraulic system damage. DO NOT
attempt to service hydraulic system in the
field. Precision fits require WHITE ROOM
CARE during overhaul.
E
F
D
A
C
B