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 1-1/4inch(030through100framesizepumps)ora41 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 torqueto79Nm(58lbsf•ft)for030through100frame 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)
Fig. 2 - Install and Torque Cartridge (Typical)
© Danfoss, 2013 |
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
Top View
Gauge port M1
System pressure A
Bottom View
Fig. 4 - Gauge Connections: Variable Pump with Twin Port End Cap (Typical)
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Gauge port M3 |
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Charge pressure |
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after filter |
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Remote |
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Gauge port M3 |
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Charge pressure |
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Gauge port M3 |
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Charge pressure |
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after filter |
Suction Filtration |
Integral |
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Right Side View |
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Pressure Filtration
Rear View
Fig. 5 - Charge Pressure Gauge Connections:
Variable Pump (Typical)
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
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System |
600 bar or 10,000 psi gauge |
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M1 |
Pressure |
9/16 — 18 |
O-ring fitting |
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Port “A” |
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System |
600 bar or 10,000 psi gauge |
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M2 |
Pressure |
9/16 — 18 |
O-ring fitting |
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Port “B” |
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Charge |
60 bar or 1000 psi gauge |
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M3 |
Pressure |
9/16 — 18 |
O-ring fitting or tee into |
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line from charge pressure filter |
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© Danfoss, 2013 |
BLN-10081 • Rev BA • September 2013 |
2 |
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