MacDon R80 Rotary Disc Pull-Type Windrower User Manual

Page 105

MAINTENANCE/SERVICE

Form # 169053

103

Model Year - 2009

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).

g. Fill with clean single grade trans-hydraulic oil

through filler pipe (A). See Section 7.3.2
Recommended Lubricants.

h. Check sight glass for proper oil level.
i. Replace cap on filler pipe.

7.10.2 Hydraulic Oil Filter

NOTE

Change hydraulic oil filter after the first
100 hours operation and every 250 hours
thereafter.

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.