TYM T233 HST, Руководство по обслуживанию

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2. HYDROSTATIC PUMP
PRESSURE TEST
Reason:
To ensure that internal parts of the hydrostatic pump
are not worn excessively, and the relief valves are
operating properly.
Equipment:
①
Gauge spec. : Over 500 kgf/cm
2
(6,610 psi)
②
Coupler spec. : 3/8”(Hose with quick coupler)
③
Adaptor spec. : PF3/8”
④
Gauge
⑤
Adaptor
4.Start engine and run until hydraulic oil is
warm.
5.Stop engine.
6.Cycle all controls to relieve any pressure
that may be in the hydraulic system
7.Locate test ports on hydrostatic
transmission inside tunnel opening.
8.Remove test port plugs.
9.Install
⑤
adaptor male into each test port.
10.Attach
④
gauge and hose assembly
as shown each test port adapter
③
②
①
④
Pc
Pa
Pb
IMPORTANT: Make sure that the hydraulic fluid
is visible in sight glass. Insufficient hydraulic
fluid could cause system to run dry and
damage pump and motor.
IMPORTANT: Do not allow valves to relieve for
more than 10 seconds or hydraulic oil may
overheat.
Procedure:
1.Park tractor on a level surface
2.Turn key switch to OFF position.
3.Make sure range transmission shift lever is in
neutral position.
as shown each test port adapter
11.Position gauges so they can be read from
tractor’s side.
12.Perform test from tractor’s side . Make
sure park brake in engaged and press right
and left brake pedals. Place range
transmission shift lever in neutral position.
Start engine and run at full throttle.
4-13
③
⑤