Ariens Sno-Thro 926 Series Reference manual

1
Date: 3/12/2013 No. B-2103
Ariens Company has received a small number of reports of chain and sprocket failures on Hydro Pro
models in the model and serial number ranges listed above. There can be two failure modes:
• the chain (p/n 02466200 for wheel-driven units, p/n 03232800 for track driven units) between the
hydrostatic transmission and the pinion shaft comes off the sprocket/gear (p/n 52601500 or 52611500)
during operation, or
• the sprocket (p/n 04375800) on the hydrostatic transmission output shaft floats far enough on the shaft
that the key (p/n 06606100) can come out and be lost during operation.
These failures can occur if the transmission bracket (p/n 04371200) is formed to a tolerance that does not
set correct tension on the chain.
To correct this problem, Ariens Company has developed a service kit that will set the tension on the chain
and eliminate the problem from recurring.
• Wheel-driven units use kit 52611700
• Track-driven units use kit 52611900
Dealer Action:
In the case of a failure as described above, dealers are to install service kit 52611700 or 52611900 on the
affected unit.
For unsold inventory, dealers are to inspect the chain on the unit and determine if the chain tension is too
loose.
Ariens Company
655 W. Ryan St.
Brillion, WI 54110
www.ariens.com
Service Bulletin
Product Family: 926 Series Snow Throwers with Hydrostatic Transmissions
Subject: Chain and Sprocket Failures
Dealer Action: Inspect and Install Parts as Necessary
Model Description Serial Number
Range
926053 Hydro Pro 28DLE 101 – 693
926054 Hydro Pro 32DLE 101 – 380
926055 Hydro Pro 36DLE 101 – 248
926056 Hydro Pro 28DLE Track 101 – 266
926326 Hydro Pro 28 CE 101 – 168
926328 Hydro Pro 32 DLE CE 101 – 150

2
Date: 3/12/2013 No. B-2103
To check the chain tension:
1. Place the unit in the service position.
2. Remove the bottom cover.
3. Place a straight edge across the chain and observe the chain deflection. The deflection is measured
from the straight edge to the top of the roller link of the chain as shown below.
If the chain deflects more than 5/16” (.3125"):
• The chain is loose and the service kit should be installed.
If the deflection is less than 5/16” (.3125"):
• The chain tension is within specification and the kit is unnecessary.
On these “good” units, remove the E-ring (p/n 05708300) from the transmission output shaft and install two
sleeve bushings (p/n 05500035) between the sprocket and the e-ring. This will limit the maximum float of
the sprocket as the chain wears.
Standard warranty applies. Dealers will be reimbursed 1.75 hours for each 52611700 or 52611900 service
kit installed on an affected model.
On units that only require inspection and two 05500035 Sleeve Bushings installed, dealers will be reim-
bursed .25 hours.
Install two sleeve bushings
(05500035) if chain tension is
correct.

Instruction Sheet
Kit Number: 52611700 & 52611900
© Copyright 2013 • Ariens Company • Brillion, WI 54110 04654800 3/13 Page 1 of 4
HYDRO PRO TENSIONING BRACKET KIT
Package Contents
Check the contents of your kit for the parts listed below
(Figure 1):
Installation
1. Stop engine and wait for hot parts to cool.
2. Loosen fasteners retaining belt cover and remove
belt cover.
3. Remove fasteners retaining belt finger and remove
belt finger. Retain all parts.
4. Remove auger belts from engine sheave. See
Figure 2.
NOTE: Traction belt will be easier to remove later in
procedure.
5. Remove four 5/16" locking center flange nuts
retaining engine to tractor frame. Discard the
locking nuts.
6. Disconnect wiring harness from engine. See
Figure 3.
7. Remove traction belt from plated idler and engine
sheave.
NOTE: Tilt engine forward slightly to remove traction belt.
8. Remove engine from unit.
WARNING: FAILURE TO FOLLOW
INSTRUCTIONS could result in personal injury
and/or damage to unit.
Read, understand, and follow all safety practices
in Owner/Operator Manual before beginning.
Item Description Qty Ariens P/N
1 Transmission Bracket 1 04371200
2 Tensioning Bracket (526117) 1 52612000
Tensioning Bracket (526119) 1 52612100
3 5/16-18 Locking Center
Flange Nut 4 06528700
4 Spacer 1 05500029
5 Pop Rivet 2 06800028
Figure 1
1
2
3
4
5
Figure 2
Remove belt finger. Remove auger belts.
Figure 3
Disconnect wiring harness.

04654800 3/13 Page 2 of 4
9. Remove four engine bushings and water baffle.
Retain all parts. See Figure 4.
10. Place unit in the service position. Remove six
screws retaining bottom cover and remove bottom
cover. Retain all parts.
11. Track Models: Remove track tension adjustment
nuts and remove tracks.
Wheel Models: Remove wheels.
12. Track Models: Remove hub lockout from right-side
drive wheel.
Wheel Models: Remove both axle halves. Do not
drop differential. Skip to step 16.
13. Track Models: Remove both drive wheels.
14. Track Models: Remove both axle halves. Do not
drop differential.
15. Track Models: Tilt track carriage up and allow it to
rest on back of machine.
16. Remove plated idler. See Figure 4.
17. Remove two hex-head screws retaining lower belt
finger. Position belt finger out of the way in the
“front” of the frame. See Figure 5.
18. Remove traction belt.
19. Remove screw retaining transmission shroud and
remove shroud. See Figure 13.
NOTE: The screw is accessible through a cutout on the
front (bottom, in service position) of the frame at top side
of the transmission. See Figure 6.
20. Using a drill and bit, remove the heads of the two
rivets retaining the transmission bracket. After rivets
are drilled out, the transmission and mounting
bracket will be loose inside tractor. See Figure 7.
Figure 4
Remove four
engine bushings.
Remove water baffle.
Plated Idler
Traction Belt
Figure 5
Lower Belt Finger
Transmission Shroud
Screw
Figure 7
Remove two transmission
bracket mounting rivets.

04654800 3/13 Page 3 of 4
21. Remove two hex head screws retaining clutch
bracket.
22. Remove pinion shaft, spacers and pinion gear. The
chain will remain on output shaft of transmission.
See Figure 9.
23. Remove hairpin from shift rod and disconnect from
the bell crank. See Figure 10.
24. Carefully remove transmission, transmission
mount, and attached controls from frame.
25. Remove transmission from mounting bracket.
Discard bracket. See Figure 11.
Track Models: Discard spacer plate (04535200).
26. Mount the transmission to the new transmission
bracket (item 1) with only the “front” bolt. Control
linkages remain on transmission. Install chain over
transmission output shaft.
NOTE: Install rear mounting hardware finger tight to ease
installation.
27. Install spacer (item 4) onto transmission output
shaft. See Figure 11.
Figure 8
Remove two hex head screws.
Figure 9
Remove pinion shaft
and pinion gear.
Figure 10
Remove hairpin and disconnect shift rod.
Figure 11
Remove and discard
transmission bracket.
Install spacer (item 4).
Track models: Remove
and discard spacer plate
04535200.

04654800 3/13 Page 4 of 4
28. Carefully install new bracket into frame. Insert the
bypass rod through the frame first, and then rotate
the transmission and bracket into position. Do not
pinch the traction engagement cable under the
mounting bracket
29. Use two pop rivets (item 5) to attach the
transmission bracket to the frame in the holes
where rivets were removed in step 20.
NOTE: Use 5/16-18 hex nuts on the studs to hold bracket
in position while installing rivets. See Figure 11.
30. Reconnect shift rod and hairpin. See Figure 10.
31. Insert pinion shaft through tensioning bracket
(item 2) and install pinion gear, pinion shaft and
new spacer (item 4). See Figure 13.
32. Insert and tighten rear mounting hardware for
transmission.
33. Reassemble unit in reverse order of disassembly.
Use four new 5/16" locking center flange nuts
(item 5) to attach engine.
Figure 12
Use 5/16-18 hex nuts to hold
transmission bracket in position.
Attach transmission bracket to frame
using two pop rivets (item 5).
Figure 13
4
2
Transmission
Shroud