Danfoss Multi-function valve replacement and adjustment Installation guide
Service Kit Instructions
Series 90
Multi-function valve replacement and adjustment
Removal and Installation
The multi-function valve cartridge is removed with an
1-1/4 inch (030 through 100 frame size pumps) or a 41
mm (130 through 250 frame size pumps) hex wrench
on the largest hex on the cartridge.
Inspect replacement cartridge for damage to parts
and O-rings.
Install cartridge in multi-function valve cavity and
torque to 79 Nm (58 lbsf•ft) for 030 through 100 frame
size pumps or 210 Nm (155 lbsf•ft) for 130 through
250 frame size pumps.
CAUTION
Do not over-torque the Multi-function Valve
Cartridge.
Fig. 1 - Remove Multi-function Valve Cartridge
(Typical)
© Danfoss, 2013
Fig. 2 - Install and Torque Cartridge (Typical)
BLN-10081 • Rev BA • September 2013
1
Gauge port M2
System pressure B
Gauge port M1
System pressure A
Fig. 3 - Gauge Connections: Variable Pump
with Radial Port End Cap (Typical)
Gauge port M2
System pressure B
Multi-function Valve Adjustment
Multi-function valves sold as spare parts are NOT
adjusted at the factory. A typical adjustment procedure is described in the following sections. Refer to
the technical information for your vehicle or machine
for the correct high pressure setting and any special
procedures.
Gauge Installation
It will be necessary to install a high pressure gauge
into the system pressure gauge ports to check the
high pressure setting of the multi-function valves.
This setting is referenced to charge pressure.
Snubbers are recommended to protect pressure
gauges. Frequent gauge calibration is necessary to
insure accuracy.
Gauge Information
Top View
Gauge port M1
System pressure A
Bottom View
Fig. 4 - Gauge Connections: Variable Pump
with Twin Port End Cap (Typical)
Gauge port M3
Charge pressure
after filter
Remote
Gauge port M3
Charge pressure
Gauge port M3
Charge pressure
after filter
Suction Filtration
Right Side View
Integral
System 600 bar or 10,000 psi gauge
M1 Pressure 9/16 — 18 O-ring fitting
Port “A”
System 600 bar or 10,000 psi gauge
M2 Pressure 9/16 — 18 O-ring fitting
Port “B”
Charge 60 bar or 1000 psi gauge
M3 Pressure 9/16 — 18 O-ring fitting or tee into
line from charge pressure filter
Fig. 5 - Charge Pressure Gauge Connections:
Variable Pump (Typical)
© Danfoss, 2013
Pressure Filtration
Rear View
BLN-10081 • Rev BA • September 2013
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