2008 17 500XOPTRS
HYDRAULIC SYSTEM
Proper sweeper operation is dependent upon a properly functioning hydraulic system. Compo
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nents such as the gutter brooms, pick-up head lift assembly, hopper lift, hopper tilt, and the
blower all depend on a properly functioning hydraulic system. The operator should always
check for hydraulic leaks and report them immediately.
WARNING
: Operators should NEVER check for hydraulic leaks using their
bare hands. High pressure used in the system could result in oil
being injected into hand causing serious injury. Always turn
sweeper off before servicing.
The main hydraulic system components to be familiar with are:
A. Hydraulic Tank and Cooler
B. Hydraulic Pumps
C. Hydraulic Motors
A. HYDRAULIC TANK AND OIL COOLER
The hydraulic tank is located at the top of the engine compartment at the rear of the sweeper.
The tank has an oil capacity of 30 gallons, and the operator must check the oil level daily! The
sight gauge and oil thermometer is located on the side of the tank for easy checking. If the oil
level is at the thick black line at the top of the sight gauge or below, refill the reservoir before op-
erating the sweeper. Use only 10W hydraulic Oil. Check indicator with at least one gutter broom
turning.
Located on the hydraulic reservoir are two oil filters. The filter on the filler cap should be
changed every 500 hours (TYMCO P/N 5010080). The return line filter should be changed at or
before the restriction indicator points to the red region of the indicator (TYMCO P/N 5018628).
The hydraulic oil cooler cools all the returning oil before it re-enters the tank. It has an electric
fan that turns on when the hydraulic temperature is above 116° Fahrenheit. Check the oil cooler
DAILY for dirt or any debris that has been caught in the fins. A clogged oil cooler will not function
correctly. Clean the oil cooler accordingly.
B. HYDRAULIC PUMPS
The sweeper is equipped with 3 pumps: the blower pump, load sense pump, and auxiliary elec
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tric pump. The auxiliary engine directly powers both the blower pump and the load sense pump.
The blower pump powers the hydraulic, blower motor only. The load sense pump powers all
other hydraulic, sweeper functions. The auxiliary electric pump is intended to be used as a
back-up to the load sense pump. It can do every thing the load sense pump can do except lift
hopper up. All three pumps are located in the engine compartment area.
A third hydraulic filter prefilters the oil before it enters the hydraulic blower circuit. It should be
changed at or before the restriction indicator points to the red region of the indicator. (TYMCO
P/N 22203) Check indicator when engine is running.
C. HYDRAULIC MOTORS
The sweeper is equipped with two hydraulic motors that power the gutter brooms. It is also
equipped with a hydraulic motor that turns the BAH broom (if BAH pick-up head is equipped).
The sweeper has another hydraulic motor that turns the blower.
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