Snapper 1650 Series User Manual

FIG. 4.52-CHECK INPUT SHAFT
NOTE: Rotor and ball-pistons must be replace as a
matched set. The ball-pistons are select fit to their
own individual bores electronically from .0002" to
.0006" clearance.
8. Examine pintle (valve body) assembly
externally for any damage. If any damage is
evident on the shaft portion that passes
through the rotors re-check inside both
rotors for possible related damage. Check
bearing in output shaft end for possible
damage or excessive wear and replace as
necessary. (Bearing can be removed by
hydraulic shunt.)
NOTE: Do not remove the two pipe plugs at the
other end of the pintle shaft, they are solid body
plugs.
9. It is usually not necessary to remove the
charge relief valve located in the outer cir¬
cumference of the pintle as shown in Fig.
4.56, to remove it, remove plug, No. 1, Fig.
4.56. Inspect spring, No. 2, for bends. Inspect
ball, No. 3, and seat in pintle for pitting or
grooves.
FIG. 4.53-CAM RING & CONTROL SHAFT
1. Cam Ring Dowel Pin.
10. It is usually not necessary to remove
the two check valves located in pintle bores
as shown in Fig. 4.57. The check valve balls
must roll free in the pintle bore by their own
weight. If the pintle is shaken the balls can
be heard if they are rolling free. To remove
the check vaves proceed as follows:
a. Remove spiral pin, No. 1, Fig. 4.58.
b. Using a tap as shown in Fig. 4.58, tap
the hole in the valve bodies and use a bolt or
puller to withdraw valve bodies from bores.
c. Remove balls and inspect for pitting or
grooves.
d. Fig. 4.59 shows check valves
removed, No. 1, spiral pin, No. 2, retaining
rings, No. 3, balls, No. 4, valve bodies.
11. The acceleration valves will not nor¬
mally requaire service. They are located in
the pintle circumference 180 degrees from
the check valves as shown in No. 1, Fig. 4.60.
NOTE: The check valves must be removed before
the acceleration valves can be removed.
To remove proceed as follows:
a. Remove check valves.
b. Remove pin, No. 2, Fig. 4.60
c. Obtain a 3/16" rod about 8" long and
insert it through the check valve
passageways in the pintle.
d. Tap lightly on the rod to push out balls,
valves and springs.
e. Removed components are shown in Fig.
4.61, No. 1, springs, No. 2, valves, No. 3 balls
and No. 4, retaining pin.
12. Remove and check dampening pistons
if necessary. They are located as shown in
Fig. 4.62. To remove, hold pintle with pistons
away from you and facing down. Tap outside
edge of pintle on work bench firmly being
careful not to strike shaft portion on any¬
thing. If this does not dislodge pistons, they
more than likely do not need service. But, if
they are scored on the surface and need re¬
placement, they may be removed by cement¬
ing a bolt to the face of the piston as shown
in Fig. 4.62 and pulling straight out. The
pistons are reversible, however the "O" rings
and back-up rings on the pistons must be in¬
stalled so that the back-up rings are toward
the outside.
13. Inspect motor rotor and ball-pistons for
damage in the same manner as the pump
rotor.
4.16 32

Snapper 1650 Series Specifications

General

Brand	Snapper
Model	1650 Series
Category	Lawn Mower
Language	English