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

"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

D75

D70

"H"

Swashplate

Headed

Series 90

Swashplate / servo arm kit