Volvo Penta — Reverse gear/upper gear housing, disassembly
Repair & overhaul · Reverse gear / upper gear housing
From a Volvo Penta service manual — check it applies to your exact model before use.
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Before you start
- Tap carefully; do not prize between the housing and bearing seal housing with a screwdriver.
- If there is any fault in the slipping clutch it must be replaced as a unit.
Procedure
- Disassemble the double bearing seal housing, 6 screws; save the shims.
- MS2: disassemble the rear bearing housing, 6 screws; save the shims.
- 120S: remove the cooling water valve, gear shift cable holder and rear cover; change the O-ring.
- Unscrew the oil filler cap and remove the dipstick and outer casing.
- MS2: turn the reverse gear upside down, remove the bottom cover (4 screws) and scrap the O-ring.
- MS2: remove the slipping clutch and the sleeve bearing from the vertical shaft.
- Press with tool 884725 to release the retention ring halves and remove them.
- Pull up the sliding sleeve with a turning motion.
- Remove the lock washer, domed washers, spacer washers and needle roller bearing.
- Press the gear wheel out using tool 884733 with standard shaft 9991801.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Source: Volvo Penta 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.