New Holland WorkMaster 50 Service Manual page 107

See 1.
• Fly wheel (1) under cut - 'A' = 2.000 mm (0.079 in)
• Power Take-Off (PTO) clutch pressure plate (2)
thickness - 'B' = 22.000 mm (0.866 in)
• Transmission clutch pressure plate (3) thickness - 'C'
= 24.000 mm (0.945 in)
• Clutch housing under cut -'E' = 2.500 mm (0.098 in)
• Dressing allowance - 'F' = 70.000 - 70.150 mm
(2.760 - 2.760 in)
• Calculate dimension 'F' as follows
F=A+B+C+S1+S2+P
Where,
S1 = Power Take-Off (PTO) clutch disc thickness
S2 = Transmission clutch disc thickness
P = Spring dimensions to restore original load =
4.500 mm (0.180 in) (fixed)
• Check that value 'F' is equal to 69.850 - 70.150 mm
(2.750 - 2.760 in)
• In restoring value 'F' check that clutch housing thick-
ness 'E' does not fall below 17.000 mm (0.670 in)
i.e. D-F = E ≥ 17.000 mm (0.670 in)
• Check that the undercut 'E' on clutch housing is
deeper than 2.500 mm (0.098 in) and restore as
necessary.
• If necessary, dress friction face on flywheel and re-
store external undercut 'A' of 2.000 mm (0.079 in).
Clutch - Clutch and components
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