GB - 17
HYDRAULIC FLUID
Check Hydraulic Fluid Level
Check the hydraulic fluid level with the dipstick before each
use (more often if leaks are observed). Stop the engine
before servicing any hydraulic parts.
1. Run unit until warm.
2. Shut off engine.
3. Unscrew tank cap to remove cap/dipstick.
NOTE: Do not allow any dirt to get into the system.
4. Wipe dipstick clean.
5. Screw cap/dipstick back into tank.
6. Remove cap/dipstick and check hydraulic oil level
mark.
7. Add hydraulic fluid as needed. Do not overfill. See
Specifications for hydraulic fluid type.
Change Hydraulic Fluid and Filter
Change hydraulic fluid and filter after the first 50 hours of
operation. They both should be changed every 500 hours
thereafter.
To change the hydraulic fluid and filter:
1. Place open container under tank. The container should
be able to hold at least 4 quarts (3.8 L) of oil.
2. Remove tank from frame and allow tank to tip rearward
to allow oil to drain from system (Figure 8).
3. After most of the oil has drained, turn the tank upside
down counterclockwise to allow the rest of the oil to
drain.
4. Clean around filter.
5. Turn filter counterclockwise to remove.
6. Fill the new oil filter with about 8 oz. (236 ml) of
hydraulic oil.
7. Apply a thin coat of oil onto seal of new filter.
8. Install new filter and hand tighten securely.
9. Fill system with about 44 oz. (1.3L) fresh, clean
hydraulic oil. See Specifications for proper type.
10. Run-in hydraulic system to bleed and lubricate
components. See below.
Hydraulic Run-In Procedure
1. Jack the drive wheels off the floor.
2. Start unit. Run engine at slowest speed for 1-2 minutes
to bleed hydraulic pumps.
3. Increase engine speed to half. Set speed control 1/3
forward. Run engine for 3-5 minutes to bleed hydraulic
motors.
NOTE: If necessary, start the motors turning by hand.
4. Shut off engine and lower the unit to the floor.
IMPORTANT: If any squealing noise occurs in the motors,
repeat the run-in procedure.
SERVICE AND ADJUSTMENTS
WARNING: AVOID INJURY. Read and
understand the entire Safety section before
proceeding.
WARNING: HYDRAULIC FLUID UNDER
PRESSURE can penetrate skin and cause
severe burns that can result in death or serious
injury.
ALWAYS keep body and hands away from pin
holes or nozzles which eject hydraulic fluid
under pressure. ALWAYS use paper or
cardboard and not hands to search for leaks.
KNOW that all hydraulic fluid connections are
tight and all hydraulic hoses and lines are in
good condition BEFORE applying pressure to
system.
Foreign fluid injected into skin must be
surgically removed within a few hours by a
doctor familiar with this form of injury or
gangrene may result.
FULL Mark
Operating
Range
OE0380
Figure 8
