Cummins/Onan TUG MT8-37 — Step 11 – Torque bracket to engine
Installation · Fan support bracket / bearing set screws
For the Cummins/Onan TUG MT8-37, from the Cummins/Onan service manual.
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Procedure
- Using torque wrench and 3/4" end wrench, tighten the m8 bolts to 26 ft.lbs (back up standoffs with 3/4" wrench)
- Torque the m6x1.0x90mm bolt to 71 in.lbs, then turn an additional 1/4 turn
- Torque the (2) m6x1.0x25mm flange head bolts to 11 ft.lbs
- Use 1/32 drill bit to drill through bearing set screw taps to mark the shaft (just the tip of the bit)
- Reinstall set screw with red Loctite and torque 29 in.lbs; repeat for the other set screw
Tools required
- Torque wrench Amazon
- 10mm socket Amazon
- 12mm socket Amazon
- 10mm open end wrench Amazon
- 3/4" open end wrench Amazon
- 3/32" hex key wrench or socket Amazon
- Red Loctite Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- M8 bolts: 26 ft.lbs
- M6x1.0x90mm: 71 in.lbs + 1/4 turn
- M6x1.0x25mm flange head bolts: 11 ft.lbs
- 10-32 Amazon eBay FridayParts $13.57 set screws: 29 in.lbs with red Loctite
Source: Cummins/Onan service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.