Regulator Valve - wsm STW37 Workshop Manual

STW34, STW37, STW40, WSM

(3) Regulator Valve

Pump Test
NOTE
• Before pump testing, perform the flowmeter connecting
and test preparation.
1. Open the loading valve completely.
2. Start the engine and set at approx. 2700 min
3. Read and note the pump delivery at no pressure.
4. Slowly close the loading valve to increase pressure approx.
16.67 MPa (170 kgf/cm
5. Read and note the pump flow at rated pressure.
6. Open the loading valve and stop the engine.
(Reference)
Hydraulic pump delivery
Factory specification
at no pressure
Factory specification
Hydraulic pump delivery
at rated pressure
Allowable limit
Condition
• Engine speed:
-1
Approx. 2700 min (rpm)
• Rated pressure:
16.67 MPa (170 kgf/cm
• Oil temperature:
40 to 60 °C (104 to 140 °F)
Checking Regulating Valve Setting Pressure
1. Start the engine and warm up the transmission fluid, and then
stop the engine.
2. Remove the pressure checking port (5) plug (PT 1/8).
3. Install the adaptor 7 to checking port (PT 1/8) (5), and then
install the adaptor D, the threaded joint, cable and pressure
gauge.
4. Start the engine and set the maximum engine speed.
5. Measure the pressure. (Do not turn the steering wheel.)
6. If the measurement is not within factory specifications, adjust
the regulating valve adjustor (4) on the regulator valve (1).
Regulating valve setting
Factory specification
pressure
Condition
• Engine speed:
Maximum
• Oil temperature:
40 to 60 °C (104 to 140 °F)
(Reference)
• Turn to clockwise direction → Pressure is increased
• Turn to counterclockwise direction → Pressure is decreased
(1) Regulator Valve
(2) Adapter D
(3) Adapter 7
8-S9
HYDRAULIC SYSTEM
-1
(rpm).
2
, 2417.9 psi).
30.6 L/min.
8.08 U.S.gals/min.
6.73 Imp.gals/min.
30.0 L/min.
7.93 U.S.gals/min.
6.60 Imp.gals/min.
25.2 L/min.
6.66 U.S.gals/min.
5.54 Imp.gals/min.
2
, 2417.9 psi)
9Y1211109HYS0007US0
10.7 to 11.7 MPa
110 to 119 kgf/cm
1560 to 1690 psi
(4) Regulating Valve Adjustor
(5) Checking Port (PT 1/8)
9Y1211109HYS0008US0
KiSC issued 11, 2014 A
2