TSE DPT40-B, Owner'S Manual

Page: 272 / 472

saue
33
Series 90 Inspections and Adjustments 8
8.1.2 Multi-Function Valve Pressure
Adjustment
Adjustment of the pressure limiter setting and the
high pressure relief valve setting is accomplished
simultaneously. The latter is automatically set ap-
proximately 35 bar (500 psi) above the former. For
description of multi-function valve see
Sec. 2.4.4.
In order to adjust the pressure limiter setting, the
motor output shaft must be locked so it does not
rotate. This may be accomplished by locking the
vehicle’s brakes or rigidly fixing the work function so
it cannot rotate.
WARNING
Take necessary precautions that the motor
shaft remains stationary during the adjust-
ment procedure.
1. Install two 1000 bar (or 10,000 psi) pressure
gauges in the high pressure gauge ports (M1 and
M2). Install a 50 bar (or 1000 psi) pressure gauge
in the pump charge pressure gauge port (M3).
2. Start the prime mover and operate at normal
speed.
3. Loosen locking nut (smallest hex on multi-func-
tion valve) with a 10 mm wrench for earlier 042
through 100 frame size units, a 19 mm wrench for
030 and later 042 through 100 frame size units, or
a 13 mm wrench for earlier 130 frame size units.
4. Insert a 3 mm (early 042 through 100 units), 5 mm
030 and (late 042 through 100 units), or 4 mm
(earlier 130 units) internal hex wrench into the
pressure adjusting screw.
NOTE: A plastic dust plug is installed in the
adjusting screw on 030 and late 042 through 250
units.
5. The factory preset pressure limiter setting is shown
on the model code as at right. It is referenced to
charge pressure, so the pressure limiter setting is
the difference between the high and low pressure
sides of the system loop. Activate or move the
control input so that pressure increases in the high
pressure side of the closed circuit to the pressure
limiter pressure setting. The pressure limiter set-
ting is reached when the pressure stops increas-
ing and remains steady at a given pressure level
(as shown on the gauges).
90000258
Multi-Function Valves on PV
Loosen Pressure Adjusting Screw Lock Nut
90000259
90L055 EA 1 N
6 S 3 C6 C 03
HNN 35 35 24
Pressure Limiter Setting
Ports A and B (differential
pressure in 10s of bars,
e.g. “35” = 350 bar)
(continued)
CONTENTS