Stone Rhino 43 Series, Operator'S Manual, Page: 42 / 66

2
Maintenance
Rhino
TM
43/54
HYDRAUlIC OIl/FIlTER
Pressurized release of fluids from hydraulic system can cause serious burns.
Shut off engine. Only remove breather cap when cool enough to touch with bare
hands. Slowly loosen cap to relieve pressure before removing completely.
Escaping hydraulic fluid under pressure can have sufficient force to penetrate
the skin, causing serious personal injury. Hydraulic fluid escaping under pres-
sure from a very small hole can be almost invisible. Use a piece of cardboard
or wood to search for possible leaks. Never use your hands to detect pres-
sure leaks. Hydraulic tank temperature can reach 180 degrees f maximum.
Refer to Operating section of this manual for hydraulic oil conditions and recommenda-
tions.
Before disconnecting any hydraulic components, be sure engine is shut off and relieve all
pressure. Before applying pressure to system, be sure all connections are tight and lines,
fittings, and hoses are not damaged.
IMPORTANT: When hoses, oil filter, and/or hydraulic components are changed, start
the engine and purge the air from the system prior to checking the oil level. To do this,
idle the engine for three minutes with control lever in NEUTRAL position. Slowly engage
forward to reverse. This allows fluid to replace air introduced with filter change. If this
procedure is not followed, partial or complete failure of the pump may result.
Change hydraulic oil filter at 50 hours then every 250 hours.
1. Remove and discard hydraulic oil filter using a filter wrench.
2. Oil new filter seal and install new filter element, tighten approximately ¾ - 1¼
turn after packing contacts filter housing. DO NOT overtighten filter element.
IMPORTANT:
Immediately after completing filter change, crank engine for 30 seconds
without permitting engine to start. This will help insure adequate lubrication to compo-
nents before engine starts.
3. Start engine and run to check for possible leaks.
4. Stop engine and replenish hydraulic oil.
Never overfill the hydraulic tank. Use the sight gauge lo-
cated on the hydraulic tank. A 1/4 – 1/2” air bubble will be
seen at the top of the gauge showing the fluid level.
Change hydraulic oil every 800 hours. Use Mobilfluid 424.
1. Run engine approximately 5 minutes to warm up oil. Shut engine off.
2. Remove breather cap and oil drain plug, drain into suitable container.
3. Apply thread sealant to breather cap and drain plug, install drain plug.
4. Fill hydraulic tank with correct hydraulic oil (approximately 20 gallons). Use
the sight gauge to watch for proper oil level, install breather cap.
IMPORTANT: Immediately after completing oil change, crank engine for 30 seconds
without permitting engine to start. This will help insure adequate lubrication to compo-
nents before engine starts.
5. Start engine and run to check for possible leaks.
6. Stop engine and replenish hydraulic oil.
WARNING
WARNING