SERVICE LEVEL MAINTENANCE
TM
37
85809
HYDRAULIC FLUID TANK
The tank is mounted to the right front of the top dresser.
Capacity of the tank is 34 liters (9 gallons). Use the
dipstick on the end of the filler cap to measure the
amount of hydraulic fluid in the tank. Measure when the
pump and engine are not running. Do not overfill the
tank, room has been allowed for the expansion of the
fluid as it heats during use.
The filler tube has an internal strainer basket to filter
out larger sized impurities in the fluid during filling of the
tank. Use caution during filling not to damage or tear the
strainer screen with long filler can nozzles. To service or
clean out the strainer, the entire filler assembly needs
be removed from the tank. The filler cap also acts as a
breather vent for the tank. The breather is necessary to
allow for pressure relief of the hydraulic system during
operation. Do not block the breather or replace the filler
cap with a cap that is not vented or capable of filtering
out dirt or dust (40 micron minimum). Always clean the
area around the filler before removing the cap.
The output line of the tank is also equipped with
a strainer screen. The strainer protects the pump
from larger sized impurities being introduced into the
hydraulic system and to the pump. If flow to the pump
is slow or restricted, the strainer may be blocked with
impurities. Flow to the pump will also be restricted if
the hydraulic fluid is too cold to flow properly through
the strainer screen. To service or clean out the strainer
screen, the pump supply hose and the tank fitting must
be removed from the tank.
DRAINING HYDRAULIC SYSTEM
The drains for the hydraulic reservoir are located on the
bottom surface of the tank. Be prepared to safely catch
and contain approximately 35 liters (9.5 gallons) of
hydraulic oil. Do Not Use The Hydraulic Pump To Pump
The Hydraulic Oil Out Of The System.
The hydraulic system is self–bleeding and does not
normally store or retain any pressure when the pump
is not in operation. However, in the event of failure of
certain components, hydraulic pressure can be trapped
in the system. Before servicing any component, check
for any remaining hydraulic pressure.
● Allow time for the hydraulic oil in the system to cool.
● Disconnect the quick release fittings from the spinner
assembly.
● Do Not Start Engine To Use The Hydraulic Pump To
Pump The Hydraulic Oil Out Of The System.
Some hydraulic oil will always remain in the system
and in the components. Always be prepared to properly
catch and contain any remaining hydraulic oil when
servicing the hydraulic system components.
TO AVOID SERIOUS INJURY,
Be Aware of the Possibility of Trapped High
Pressure in the Hydraulic System.
DO NOT USE HANDS TO CHECK FOR LEAKS!!
WEAR SAFETY GLASSES!!
HYDRAULIC PUMP
The hydraulic pump is mounted directly to the crankshaft
on the engine. The pump begins to operate as soon as
the engine is started. The pump is a gear pump type.
The pump has two hydraulic hoses attached, the 1” hose
is the hydraulic fluid supply hose from the reservoir. The
other hose, a 1/2” inch, is the hydraulic pressure output
line which is routed to port “P” on the manifold valve
block.
If the pump is not operational, check the following:
● Pump drive coupling between engine and pump is
inoperable.
● Strainer screen in tank output fitting is blocked,
partially blocked or damaged.
● Hydraulic fluid wrong for temperature range.
Hydraulic fluid too cold to properly flow to pump or
hydraulic fluid is to hot to operate motors.
● Hydraulic fluid supply hose collapsing during
operation. Fluid supply hose kinked or twisted.
● Twisted, kinked, or restricted pressure output hose
on pump.
● Hydraulic fluid level in tank too low.
● Damage or worn pump. Excess internal leakage in
the pump.
WARNING
