TYM T303HST User Manual

13.Slowly depress forward directional pedal and
observe gauge.Gauge should slowly rise to
approximately 41368 KPa±
±±
±1378KPa
(6000psi ±200psi)and relief valve will
open with an audible squealing noise.
14.Repeat same procedure with reverse pedal.
Specifications:
-Pump pressure should reach approximately
41368 KPa±
±±
±1378KPa (6000psi ±200psi) in
either direction and then relieve.
Results:
-If pressure will not reach 41368 Kpa Maximum
(6000psi) in either direction,check charge
Pressure.(SEE ”CHARGE PUMP PRESSURE
TEST on page 14 )
-If charge pressure is good and hydrostatic pump
pressure will not get up to relief pressure
hydrostatic pump is worn or damaged.
-If pressure reaches 41368KPa(6000psi) in one
direction and not the other,one of the relief
valves is defective or the seat is leaking.
3.CHARGE PUMP PRESSURE TEST
Procedure:
1.Park tractor on a level surface and set park
brake.
2.Turn key switch to OFF position.
3.Shift transmission to NEUTRAL.
IMPORTANT:Make sure to relieve system
pressure before loosening any system lines or
hoses.
4. Cycle all controls to relieve any pressure that
may be in the hydraulic system.
3.CHARGE PUMP PRESSURE TEST
Reason:
To ensure that charge pump is operating at
specified pressure to supply oil to hydrostatic
pump.
Equipment:
JT03344 2,000 Kpa (300 psi) Gauge
JT03017 Hose with quick coupler
JT03240 7/16-20M 37°X7/17-20 F 37 °
Elbow
JT03264 Quick coupler F7/16-20 F 37 °
Adaptor
JT05480 Quick coupler MXM14-1.5
ORB Adapter
NOTE:4WD shaft removed for clarity
5.Underneath the tractor,at the front of the
tunnel ,locate the hydrostatic transmission,
Remove the plug in the charge pressure test port.
6.Assembled test equipment as shown and install
to test port.
7.Start engine and run at high idle (2500~2700rpm).
8.Check pressure reading gauge.
Specifications:
Charge Pressure------1723-2068KPa(250-300psi).
Results:
-Charge pressure should reach 1723-2068KPa
(250-300 psi) cannot obtained;the mesh inlet filter
may be restricted,the suction line may be restricted
or leaking air,or front hydraulic pump may be
defective
4-15

TYM T303HST Specifications

General

Brand	TYM
Model	T303HST
Category	Tractor
Language	English