General Information
An improvement was made to the design of the servo arm of Series 90 variable pumps at S/N 88-14-XXXXX for 055
pumps and at S/N 88-16-XXXXX for 075 and 100 pumps. As a result of this change, servo arms and swashplates for
Series 90 055, 075, and 100 variable pumps are no longer sold as separate parts. Swashplate / Servo Arm Kits are
being made available for these units.
The slider block (reference F20) for 055 pumps was also changed at this time, and is included in the Swashplate / Servo
Arm Kit for 55cc pumps. The new slider block will work in any vintage pump.
The slider block (reference F20) and servo piston (reference S10) for 075 pumps was also changed at this time, and
are included in the Swashplate / Servo Arm Kit for 75cc pumps. The new slider block and piston will work in any vintage
pump.
The internal hex screw (reference D65), holding the guide block (reference D60) and the control link (reference M14E,
H, M) to the swashplate, is to be torqued to 24 lbsf•ft (32 Nm). The guide block (reference D60) must be installed with
its straight sides perpendicular to the flat (slipper) surface of the swashplate. The headed spring pin (reference D75)
and washer (reference D70) are to be installed so the distance "H" between the washer and the swashplate is as
follows:
"H" ecnatsiDpmuP
Frame Size ± 0.010 in. (± 0.25 mm)
055 .210 in. (5.33 mm)
075 .240 in. (9.45 mm)
100 .170 in. (4.32 mm)
F12
REF
F11
REF
S10
F11
F12
M14E
M14H
M14M
D50
F20
D60
D65
D10
D55
D75
D70
"H"
Swashplate
Headed
Pin
Flat
Washer
© Danfoss, 2013
BLN-10035 • Rev CA • September 2013
1
Service Kit Instructions
Series 90
Swashplate / servo arm kit
