Volvo Penta 120S, Workshop Manual

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Technical data
Type designation
Drive ....................................................................... 120S, 120S-B, 120S-C, 120S-D, 120S-E
Reverse gear ........................................................... MS2, MS2B-L, MS2V
Gear ratio
Drive ....................................................................... 2.2:1
Reverse gear ........................................................... 2.4:1 and 3.0:1
Flank clearance
Input gear - gear wheel, measured directly on
the gear wheels ....................................................... 0.10–0.25 mm (0.004–0.010")
Output shaft - lower drive measured on the
gear wheels. Only MS2, MS2B-A, MS2B-L,
MS2A-D, MS2A-E, MS2L-D, MS2L-E ..................... 0.10–0.25 mm (0.004–0.010")
Pinion - crown wheel. Only MS2V ........................... 0.10–0.25 mm (0.004–0.010")
Propeller shaft - vertical shaft, measured on
propeller shaft splines ............................................. 0.04–0.10 mm (0.0016–0.004")
Preload, bearings:
Input shaft bearings ................................................ 10–18 N (2.25–4.05 lbf)
Output shaft bearings .............................................. 13–25 N (2.92–5.62 lbf)
Lower shaft bearings, slipping clutch ....................... 15–30 N (3.37–6.74 lbf)
Propeller shaft bearings .......................................... No slack up to 35 N (7.87 lbf), measured on propeller shaft
Pinion bearing. Only MS2BV ................................... 10.0–17.5 N (2.25–3.93 lbf)
Tubular shaft bearing Only MS2BV ......................... 10.0–16.0 N (2.25–3.60 lbf)
Lubrication system
Oil grade, MS2A-E, MS2L-E ................................... API GL5/SAE 75W/90, synthetic
Oil grade 120S-E ..................................................... API GL5/SAE 75W/90, synthetic
Oil grade, other reverse gears and drives ................ Engine oil for Service SE or CD
Viscosity, Service SE ............................................. Multigrade SAE 10W/40 *
Viscosity, Service CD ............................................. Over +10°C: SAE 20W/30 *
Viscosity, Service CD ............................................. Below +10°C: SAE10W *
Oil volume, drive. .................................................... 2.8 l (0.74 US gallon)
With 2” extension, total ....................................... 3.1 l (0.82 US gallon)
With 4” extension, total ....................................... 3.3 l (0.87 US gallon)
Oil volume, reverse gear. ........................................ 0.8 l (0.21 US gallon)
Oil volume, MS2V reverse gear .............................. 1.8 l (0.48 US gallon)
*) Or Volvo Penta oil for diesel engines, please refer to the handbook.