New Holland TN55, Repair Manual

Page: 40 / 41

18 SECTION 10 -- ENGINE -- CHAPTER 1
VALVE TIMING GEAR DATA mm (inches) VALVE TIMING GEAR DATA mm (inches)
Timing gear tooth backlash . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.160 (0.0063)
Inside diameter of intermediate gear bushings
(fitted and reamed) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37.050 to 37.075 (1.4587 to 1.4596)
Diameter of intermediate gear journal . . . . . . . . . . . . . . . . . . . . . . . 36.975 to 37.000 (1.4557 to 1.4567)
Journal to bushing clearance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.050 to 0.100 (0.0020 to 0.0039)
Wear limit endfloat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.15 (0.0059)
Bushing interference fit in seat in intermediate gear . . . . . . . . . . . 0.063 to 0.140 (0.0025 to 0.0055)
Outside diameter of camshaft bearings:
-- front . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54.875 to 54.930 (2.1604 to 2.1626)
-- centre . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54.375 to 54.430 (2.1407 to 2.1429)
-- rear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53.875 to 53.930 (2.1211 to 2.1232)
Interference between bearings and seats in cylinder block . . . . . 0.070 to 0.150 (0.0028 to 0.0059)
Inside diameter of camshaft bearings (fitted and reamed):
-- front . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51.080 to 51.130 (2.0110 to 2.0130)
-- centre . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50.580 to 50.630 (2.1604 to 2.1626)
-- rear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50.080 to 50.130 (2.1604 to 2.1626)
Diameter of camshaft journals:
-- front . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50.970 to 51.000 (1.9913 to 2.0079)
-- centre . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50.470 to 50.500 (1.9870 to 1.9882)
-- rear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49.970 to 50.000 (1.9673 to 1.9685)
Clearance between camshaft journals and bearings . . . . . . . . . . . 0.080 to 0.160 (0.0031 to 0.0063)
Wear limit endfloat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.20 (0.0079)
Camshaft endfloat between thrust plate and seat on camshaft . . 0.070 to 0.220 (0.0028 to 0.0087)
For further timing data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See page 4
TAPPET DATA mm (inches) TAPPET DATA mm (inches)
Tappet bore in crankcase . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15.000 to 15.018 (0.5906 to 0.5913)
Outside diameter of standard tappet . . . . . . . . . . . . . . . . . . . . . . . . 14.950 to 14.970 (0.5886 to 0.5894)
Tappet running clearance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.030 to 0.068 (0.0012 to 0.0027)
Wear limit endfloat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.15 (0.0059)
Tappet oversizes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.1 -- 0.2 -- 0.3
(0.0039 -- 0.0078 -- 0.0118)