Repair
334513N
33
Drive Section Repair
1.
, page 30.
2. Place two 7/32 in. (or smaller) Allen wrenches (or
similar tools) in the holes on the cam assembly (13),
and use them to rotate the cam assembly until the
key (12) is in the downward position.
3. Use a 3/16 in. Allen wrench to remove the two
screws (17) attaching the stroke adjuster (9a) to the
return carriage (11).
4. Remove the red plug from the bottom of the
housing (2) and use a 1/8 in. Allen wrench to
remove the set screw on the bottom rear of the cam
assembly.
NOTE:
Earlier series models may require different-sized
Allen wrenches.
5. Remove the cam assembly (13) from the motor
shaft.
6. Slide the stroke adjuster assembly (9a) towards the
motor shaft and out of the housing.
7. Bring the stroke adjuster assembly (9a) into the
housing (2), and slide the shaft through the drive
cylinder (6a).
8. Place the cam assembly (13) onto the shaft, with
the bearing in the front and the step-down in the
rear, and slide on until the motor shaft is flush with
the front face of the cam assembly (13).
9. Apply lubricant to the cam assembly (13) outside
diameter bearing surface.
10. Insert the cam set screw (16), with pre-applied
threadlocker, and torque to 70-75 in-lbs.
11. Orient the stroke adjuster assembly (9a) so that the
end of the shaft (where the fluid head connects) has
the opening of the U-shape at the top; otherwise,
the fluid head will not be able to be attached during
reassembly.
12. Use the two screws (17) to attach the stroke
adjuster (9a) to the plunger return carriage (11)
behind the cam assembly (13). Torque the screws
to 70-75 in-lbs.
13. Install the red plug into the bottom of the
housing (2).
F
IG
. 22 Drive section repair
6a
5
9c
2
13
9a
17
9b
9d
