DSTOPTRS 24 2008
HYDRAULIC SYSTEM
Proper sweeper operation is dependent upon a properly functioning hydraulic system. Compo
-
nents such as the gutter broom, pick-up head lift assembly and hopper dump are all dependent
on the hydraulic system for their proper operation.
The main hydraulic system components to be familiar with are:
1. Hydraulic Reservoir
2. Hydraulic Pump
3. Control Valves
A. HYDRAULIC RESERVOIR
The hydraulic reservoir is located in the center of the sweeper between the auxiliary en-
gine and blower housing (see Page 3). The reservoir oil capacity is 21.5 gallons and the
operator must check the oil level daily! The sight gauge is located on the side of the re-
servoir for easy checking. If the oil level is at the “ADD” mark or below, refill reservoir
before operating sweeper. Use only 10W motor oil. NEVER USE AUTOMATIC
TRANSMISSION OR POWER STEERING FLUID IN THE TYMCO HYDRAULIC
SYSTEM.
Located on the hydraulic reservoir are two oil filters. These filters should be changed
every 100 hours of sweeper service. The hydraulic oil filter is a spin-on automotive
type (TYMCO P/N 5010080).
NOTE: Drain the break-in oil after initial 100 hours of operation, then once every
12 months or every 1000 hours, whichever occurs first. Drain plug is located
on the bottom of the reservoir.
WARNING
: Operator should never check for hydraulic leak using bare hand.
High pressure used in system could result in oil being injected into
hand causing serious injury. Always turn sweeper off before
servicing sweeper.
B. HYDRAULIC PUMPS
Both the BAH and the standard hydraulic pumps are driven by the sweeper auxiliary
engine.
C. CONTROL VALVES
1. Standard Hydraulic System
The hydraulic control valve assembly is used to control the flow of oil to the various
hydraulic components. The Model 600 valve assembly is located on the left side of
the sweeper just below the PTO assembly. The standard valve assembly is made up
of four control valve segments attached to a common manifold. The first pair of
valves control the gutter brooms, with the second pair controlling the dump door and
pick-up head. A fifth or sixth valve will be found if optional hydraulically controlled
equipment is ordered on the sweeper.
Separating the first two valves from the rear two valves is a relief valve and a by-
pass valve. The relief valve reduces the pressure from 2500 PSI to 1500 PSI. There-
fore, the primary system pressure of 2500 PSI (set at the pump) is necessary for
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