Snapper 1650 Series User Manual

NOTE: The input shaft cannot be replaced without
complete disassembly of transmission. If further dis¬
assembly is necessary follow the next steps.
8. Invert transmission on wood block so
that output shaft is up as shown in Fig. 4.45.
NOTE: Be sure transmission is level and stable on
the wood block.
9. Remove two cap screws, No. 1, Fig. 4.45,
and then re-install about two threads.
10. The cast iron assembly is now ready for
initial separation from the aluminum body. If
possible lift the cast iron assembly to the
limit of the cap screw stops. If difficulty is en¬
countered in separating the two components
use a plastic hammer to tap the components
to break the fluid seal.
When the seal is broken, remove cap
screws and very gently lift off the cast iron
assembly.
11. Being careful not to disturb the tran¬
smission place a strong rubber band, No. 1,
Fig. 4.46, around the motor rotor to prevent
the ball-pistons from falling out.
12. The motor rotor assembly may now be
lifted out but extra care should be exercised
in handling.
13. Select an egg carton and number two
rows of five holes.
14. Locate a letter, No. 1, Fig. 4.47, stam¬
ped on the face of the rotor.
15. Working clockwise from the letter
remove ball-pistons one at a time and place
in egg carton.
16. The pintle assembly (valve body). No.
1, Fig. 4.48 may now be lifted from the
aluminum body.
17. The pump rotor assembly is now ready
to be lifted out exercising the caution and
method to hodl the ball-pistons in place as
with the motor rotor.
18. Locate letter, stamped on the face of
the pump rotor.
19. Working clockwise from the letter,
remove the ball-pistons one at a time and
place them in egg carton.
20. The cam ring and pump race assembly,
No. 1, Fig. 4.49, may now be lifted out noting
carefully the position of cam ring insert, No.
2. (The thin wall end of the insert must
always be positioned outboard).
21. With the pump cam ring now removed
the inside of the aluminum body is now expo¬
sed, Fig. 4.50. Note that there are two but¬
tons. No. 1, loose fitting in holes in the
aluminum body. The buttons serve to prevent
the cam ring from contacting the aluminum
cover.
REASSEMBLY OF TRANSMISSION
Reassembly of this transmission is the
reverse of disassembly. It is during this
procedure that final examination of all parts
should be made and replacements installed
as necessary. Following is recommended
procedure for reassembly.
1. Examine aluminum body for any eviden¬
ce of cracks and if found replace body.
2. Inspect for excessive clearance between
input shaft and aluminum body bushing.
Specified clearance is .0013" to .0033". If
clearance is excessive replace body as bush¬
ing is not replaceable.
3. Remove snap ring, No. 1, Fig. 4.51, from
input shaft, No. 2, and slide shaft inward. In¬
spect input shaft assembly. Fig. 4.52, for ex¬
cessive wear and replace if necessary.
FIG. 4.51-INPUT SHAFT SNAP RING
1. Input Shaft Snap Ring Location.
2. Input Shaft.
4. Inspect cam ring dowel pin, No. 1, Fig.
4.53, in aluminum body. If loose, body must
be replaced.
5. Inspect control shaft assembly, in cover,
If shaft is excessively loose in the cover it is
highly probable that a new cover will be
required.
6. Examine pump ball-piston race in cam
ring. If scored, cam ring and race assembly
must be replaced.
7. Examine pump rotor bores and ball-
pistons for any evidence of scoring, pitting,
contamination, or excessive wear and
replace if necessary.
4.15 37

Snapper 1650 Series Specifications

General

Brand	Snapper
Model	1650 Series
Category	Lawn Mower
Language	English