MacDon R85 Rotary Disc 13 Foot User Manual

Page 107

MAINTENANCE AND SERVICING

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105

Revision C

5. Top up through port (J) until level is

approximately 1 to 1-1/4 inches (25–32 mm)
below top face of port (J). Ensure APT hitch
is level.

6. Replace fitting (G), and tighten hose (F).

7. Replace cap on filler pipe (H).

7.7.2 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 (A).

b. Remove the filter (B), and clean the gasket

surface of the filter head. If oil runs out of filter
head, lower the front of APT hitch as low as
possible.

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.

7.7.3 Pressure Relief Valve

A possible cause of poor cutting performance
and/or excessive heating of hydraulic oil is low
relief pressure.

The relief valve (C) is factory set at 5,800 psi
(40 MPa). See your Dealer for adjustment or
service.