TSE DPT40-B, Owner'S Manual

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Series 90 Inspections and Adjustments 8
Shim Adjustable Charge
Pressure Relief Valve
(Pump)
Screw Adjustable Charge
Pressure Relief Valve
(Pump)
90000262 90000264
NOTE: These pressures assume a pump speed
of 1775 rpm. At higher pump input speeds (with
higher charge flows) the charge pressure will rise
over the rated setting.
3. Earlier production Series 90 pumps are equipped
with a shim adjustable charge relief valve. Shim
kits are available from Sauer-Sundstrand. Adjust-
ment of charge pressure is accomplished by re-
moving the plug [1 inch Hex] and changing the
shim thickness behind the spring. The plug for this
type of charge relief valve should be torqued to 68
Nm (50 lbf•ft).
Later production Series 90 pumps are equipped
with an external screw adjustable charge relief
valve. Adjustment of the charge pressure is ac-
complished by loosening the lock nut (with a 1-1/
16 inch hex wrench for 030 through 100 units, or
a 1-5/8 inch hex wrench for 130 through 250
units), and turning the adjustment plug with a
large screwdriver or a 1/2 inch hex wrench. Clock-
wise rotation of the plug increases the setting, and
counterclockwise rotation decreases the setting
(at a rate of approximately 3.4 bar (50 psi) per
turn). The lock nut for this type of charge relief
valve should be torqued to 52 Nm (38 lbf•ft).
4. Once the desired charge pressure setting is
achieved, remove the gauges.
e d o C l e d o M
g n i t t e S
* e r u s s e r P e g r a h C d e r u s a e M
e g n a r d e t a t s (
±
[ r a b 7 . 1
±
) ] i s p 5 2
r a b 0 2
r a b 2 . 1 2 o t 1 . 0 2
] i s p 8 0 3 o t 1 9 2 [
r a b 4 2
r a b 2 . 5 2 o t 0 . 4 2
] i s p 5 6 3 o t 8 4 3 [
r a b 8 2
r a b 0 . 9 2 o t 8 . 7 2
] i s p 0 2 4 o t 3 0 4 [
* This is the actual charge pressure port gauge reading minus
the case pressure port gauge reading.
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