Graco DutyMax DH230 HD Operation, Parts page 30

Maintenance
Hydraulic Oil/Filter
Change
1. Place drip pan or rags under sprayer to
catch hydraulic oil that drains out.
2. Remove drain plug (2). Allow hydraulic
oil to drain.
3. Unscrew filter (227) slowly - oil runs into
groove and drains out rear.
4. Remove and replace ball (216), spring
(217), and retainer (215).
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5. Install drain plug (2) and oil filter (227).
tighten oil filter additional 3/4 turn after
gasket contacts the base.
6. Fill with oil tank with five quarts (4.75
liters) of hydraulic oil. See page 26 for
hydraulic oil specifications.
7. Check oil level.
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