Jeep cherokee 2000 Service Manual page 1011

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DESCRIPTION AND OPERATION (Continued)
1 – GOVERNOR PLUG END PLATE
2 – SHUTTLE VALVE
3 – 1–2 GOVERNOR PLUG
4 – VALVE BODY
5 – REGULATOR VALVE THROTTLE PRESSURE PLUG
6 – SLEEVE
7 – LINE PRESSURE PLUG
8 – RETAINER
9 – 1–2 SHIFT VALVE
10 – 1–2 SHIFT CONTROL VALVE
REGULATOR VALVE
The pressure regulator valve is needed to control
the hydraulic pressure within the system and reduce
the amount of heat produced in the fluid. The pres-
sure regulator valve is located in the valve body near
the manual valve. The pressure regulator valve train
controls the maximum pressure in the lines by
metering the dumping of fluid back into the sump.
Regulated pressure is referred to as "line pressure."
The regulator valve (Fig. 20) has a spring on one
end that pushes the valve to the left. This closes a
dump (vent) that is used to lower pressure. The clos-
ing of the dump will cause the oil pressure to
increase. Oil pressure on the opposite end of the
valve pushes the valve to the right, opening the
dump and lowering oil pressure. The result is spring
pressure working against oil pressure to maintain
AUTOMATIC TRANSMISSION—30RH
Fig. 18 Valve Body Assembly
11 – KICKDOWN LIMIT VALVE
12 – END PLATE
13 – THROTTLE PRESSURE PLUG
14 – KICKDOWN LIMIT VALVE BODY
15 – E-RING
16 – 2–3 SHIFT VALVE
17 – GUIDES
18 – 2–3 GOVERNOR PLUG
19 – PRIMARY SPRING
20 – SHUTTLE VALVE THROTTLE PLUG
the oil at specific pressures. With the engine run-
ning, fluid flows from the pump to the pressure reg-
ulator valve, manual valve, and the interconnected
circuits. As fluid is sent through passages to the reg-
ulator valve, the pressure pushes the valve to the
right against the large spring. It is also sent to the
reaction areas on the left side of the throttle pressure
plug and the line pressure plug. With the gear selec-
tor in the park position, fluid recirculates through
the regulator and manual valves back to the sump.
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