Required tools
The service procedures described in this manual can be performed using common mechanic’s hand
tools. Special tools, if required, are shown. When testing system pressures, calibrate pressure gauges
frequently to ensure accuracy. Use snubbers to protect gauges.
Port locations and gauge installation
The following tables and drawing show the port locations and gauge sizes needed.
Port information
Port identifier
Port size
Wrench size
Pressure obtained
Gauge size, bar [psi]
L1, L2
1-1/16 12 SAE
9/16 internal hex
Case drain
10 [150]
MA, MB
9/16 18 SAE
11/16 hex
System pressure
600 [9,000]
M3
9/16 18 UNF
11/16 hex
Charge pressure
50 [750]
M4, M5
9/16 18 SAE
11/16 hex
Servo pressure
50 [750]
System valves
Port identifier
Relief
Port size
Wrench size
RA
A port pressure relief valve
1-5/16 12 UNF
1-1/4 hex
RB
B port pressure relief valve
1-5/16 12 UNF
1-1/4 hex
R
Charge pressure relief valve
3/4 16 UNF
7/8 hex
BP
Bypass valve
5/8 18 UNF
1 inch hex
System ports
Port identifier
Port size
A system pressure port
1-5/16 12 SAE
B system pressure port
1-5/16 12 SAE
S (charge pressure inlet)
1-5/16 12 SAE
Service Manual
Series 40 M46 Variable Pumps
Required tools and pressure measurements
12 |
©
Danfoss | September 2017
11026743 | AX00000027en-US0202