Displacement limiter
H1 pumps are designed with optional mechanical displacement (stroke) limiters factory set to max.
displacement. The maximum displacement of the pump can be set independently for forward and
reverse using the two adjustment screws to mechanically limit the travel of the servo piston down to 50
% displacement.
Adjustments under operating conditions may cause leakage. The adjustment screw can be completely
removed from the threaded bore if backed out to far.
P003 266
Displacement change (approximately) H1P 069/078
Parameter
Size 069/078
1 Turn of displacement limiter screw
7.4 cm
3
[0.45 in
3
]
Internal wrench size
4 mm
External wrench size
13 mm
Torque for external hex seal lock nut
24 N•m [212 lbf•in]
For more information, see
H1 Axial Piston Pumps, Service Manual,
AX00000087, the section “Displacement
Limiter Adjustment”.
Technical Information
H1 Axial Piston Single Pumps, Size 069/078
Control Options
©
Danfoss | May 2017
11062169 | BC00000058en-US0801 | 39