Toro 108-7325, 108-7327 Installation Instructions

Form No. 3353-635 Rev A

Left- and Right-Hand Gearcase Assemblies

For Power Max®, Power Shift® and 824XL Power Throw Snowthrowers

Model No. 108-7325 Model No. 108-7327

Installation Instructions

Figure 1

1. Auger shaft 5. Helical gear

2. Right-hand gearcase assembly

3. Gasket 7. Left-hand gearcase assembly 11. Impeller shaft 15. Input bushing

4. Thrust washer 8. Woodruff key

6. Pipe plug 10. Worm bushing

9. Screw

12. Retaining ring

Disassembling the Gearcase

1. R emo v e the g earcase assembly from the sno wthro w er .

Note: R efer to ser vice man ual 492-9138 or 492-0354.

2. Disassemble the g earcase assembly .

3. R emo v e and discard the old g ask et (if applicable).

13. Thrust bearing (0.078 inch thick)

14. Thrust bearing (0.125 inch thick)

16. Oil seal

Inspecting the Gearcase

1. Inspect the g earcase castings for ﬂa ws or scratc hes in the g ask et surface area, and re place the castings if necessar y .

2. If the g earcase has a g ask et and y ou plan to reuse the castings , clean the mac hined surfaces with a liquid g ask et remo v er .

6. Star t the 9 screws b y hand to a v oid cross threading, and tor que them in sequence to 135 to 165 in-lb (17.0 N·m).

7. R emo v e the exter nal loop of the g ask et b y cutting along the perforations .

8. Assemble the aug ers to the g earcase .

Note: Do not clean the oil from the pressed-in output bushings .

3. If the g earcase does not ha v e a g ask et but has a sealant, re place the g earcase halv es with the new g earcase half assemblies (par t nos . 108-7324 and 108-7326).

Note: T he new g ask et will not ﬁt on the old g earcase castings .

4. Inspect the 2 g ears , 4 bronze bushings , 2 shafts , and 3 oil seals for w ear or damag e , and re place them if necessar y .

Installing the Gasket and Assembling the Gearcase

1. Assemble the g ears and shafts into the left-hand g earcase half .

2. Apply a dab of silicone sealant to the mac hined surface of the left-hand g earcase half at the top and bottom of the oil seal.

Note: Use Loctite 598 or an equi v alent automoti v e R TV silicone sealant. Do not use silicone sealant anywhere else on the mac hined surface .

3. Carefully align the new g ask et onto the left-hand g earcase half . T he exter nal loop in the g ask et can be bent up on the perforated fold lines .

Press the g ask et do wn into the 2 dabs of sealant so that the sealant ﬂo ws around the g ask et edg es .

Installing and Filling the Gearcase

1. Install the aug er assembly in the sno wthro w er; refer to the ser vice man ual.

2. Mo v e the sno wthro w er to a lev el surface .

3. R emo v e the pipe plug from the g earcase .

4. Add g ear oil 80W -90 until it begins to ﬂo w out of the ﬁll hole .

5. Apply a thin coating of thread sealant to the pipe plug threads before installing the pipe plug .

6. T or que the pipe plug to 80 to 90 in-lb (9.6 N·m).

7. Coat the impeller shaft with an anti-seize compound before installing the impeller pulley .

8. Install the pulley . Note: Before tightening the square head

set screws on the impeller pulley , remo v e all end pla y from the impeller shaft b y pulling it to the rear while tur ning the shaft slo wly in a cloc kwise direction (from the operating position) and push the pulley forw ard ag ainst the thr ust w asher; refer to the ser vice man ual.

9. Tighten the set screws . Note: Chec k the g earcase ﬂuid lev el during

setup , after ev er y ten operating hours , and after ann ual storag e .

4. Carefully align the right-hand g earcase half .

Note: Do not disr upt the g ask et.

5. If y ou reuse the left-hand casting, thoroughly clean the screws and apply a thread loc k er (Loctite 242 or an equi v alent) before assembling them.

Note: Y ou do not need to do this ste p if y ou are using a new left-hand casting .

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