Hydraulic Oil Filter; Pressure Relief Valve - MacDon R80 Operator's Manual

b. Place drain pan under pump (B).
c. Lower APT as low as possible with jack.
d. Loosen hose clamp (C) on the pump suction
hose and pull the hose off the fitting.
e. Allow oil to drain into container.
f. Reconnect pump suction hose to pump. Tighten
clamp (C).
A
g. Fill with clean single grade trans-hydraulic oil
through filler pipe (A).
Recommended Lubricants.
h. Check sight glass for proper oil level.
i. Replace cap on filler pipe.
Form # 169053
MAINTENANCE/SERVICE
C
B
See Section 7.3.2
102

7.10.2 Hydraulic Oil Filter

Change hydraulic oil filter after the first
100 hours operation and every 250 hours
thereafter.
D
E
a. Clean around the filter head (D).
b. Remove the filter (E) and clean the gasket
surface of the filter head.
c. Apply a thin film of clean oil to the gasket on the
new filter.
d. Install new filter. Turn the filter onto the mount
until the gasket contacts the filter head. Tighten
the filter an additional 1/2 to 3/4 turn by hand.
IMPORTANT
Do not use a filter wrench to install the
filter. Over-tightening can damage gasket
and filter.

7.10.3 Pressure Relief Valve

A possible cause of poor cutting performance
and/or excessive heating of hydraulic oil is low
relief pressure. The relief valve (F) is factory set
at 6000 psi (41.37 MPa). See your dealer for
adjustment or service.
NOTE
F
Model Year - 2010