Port Locations and Gauge Installation
The following table and drawing show the port locations and gauge sizes needed. When testing system
pressures, calibrate pressure gauges frequently to ensure accuracy. Use snubbers to protect gauges.
Port information
Port identifier
Port size
Wrench size
Pressure obtained
Gauge size, bar [psi]
L2, L4
1 1/16-12 UNF 2B
9/16 internal hex
Case drain
10 bar [100 psi]
MA, MB,
9/16-18 UNF
1/4 internal hex
System pressure
600 bar [10,000 psi]
M3
9/16-18 UNF 2B
1/4 internal hex
Charge pressure
50 bar [1000 psi]
M4, M5
7/16-20 UNF 2B
3/16 internal hex
Servo pressure
50 bar [1000 psi]
Port locations
P106 232E
Port B
split flange boss
1 5/16 code 62
per ISO 6162
thread: M12
18 Min. full
thread depth
Charge pump inlet S
1 5/16-12 UNF 2B
Port A
split flange boss 1 5/16 code 62
per ISO 6162 thread: M12
18 Min. full thread depth
Case drain Port L4
use highest port
as outlet
1 1/16-12 UNF 2B
Gage port M4
servo pressure
7/16-20 UNF 2B
Gauge port MA
System pressure
9/16-18 UNF-2B
Gauge port MB
System pressure
9/16-18 UNF-2B
Remote filtration port E
7/8-14 UNF-2B
Remote filtration port E
7/8-14 UNF-2B
Remote filtration port D
7/8-14 UNF-2B
Gauge port M3
Charge pressure
after filter
9/16-18 UNF-2B
Gauge port M5 Servo pressure
7/16-20 UNF-2B
Charge construction port
9/16-18 UNF-2B
Case drain port L2
1 1/16-12 UNF-2B
D065 O-ring plug
7/16-20 UNF-2B
use for air bleed when filling pump
Repair Instructions
H1 45/53/60/68 Closed Circuit Axial Piston Pumps
Port locations
520L0957 • Rev CB • September 2014
51
