Rocker Shaft Cross-Sectional View - Long 360 Series Service Manual

B
80
FIG. C.0/13 ROCKER SHAFT CROSS-SECTIONAL VIEW
b. Rockshaft sections; c. External control leverage section; A. Lift control lever; L •. 0.315"·0.327" (8
·8.3 mm.) Recessing of the left side outer bushing; Lz. 0.807"·0.815" (20.5·20.7 mm.) Correct recess·
ing of the right side bushing; L •. 0.394"·0.402" (10·10.2 mm.) Correct width of the shaft seal; 40. Inside
arm; 44. Left hand side seal; 45. Rockshaft; 47. Right hand side seal; 48. Spacer, 0.532·0.543"
(13.5·13.8 mm.) long; 51. Left side bushings; 52. Right side bushings; 67. Oil seal; 68. Spacer;
69. Rocker arm roller supporting arm; 79. Screw securing lever (80) to roller supporting arm (69);
80. Arms maximum lift stop lever; 95. Friction discs; 96. Control lever nut; 97. Spring; 98. Left side
spacing ring (to be added to those units which are found without one at disassembly
INSPECTION
Wash components in solvent then proceed to in-
spect and check them referring to the data
reported on the table in rear of this section.
1. Check the functional efficiency of the seal-
ing rings (Fig. C.0/8) installed between
cylinder barrel and control valve and between
cylinder liner and piston.
Check the plastic seal back-up for wear and
conditions of the soldered joint on the barrel
seal brass ring.
If necessary, replace.
Replace, if functionally poor, the sealing
rings installed on the control valve block
valves and rockshaft, the sealing ring (Item
67, Fig. C.0/1) on the roller lever and that bet-
ween hydraulic lift and transmission case, at
the outlet duct (Item 93, Fig. C.0/3).
2. Check the clearance between rockshaft and
bushings and between top link hinge pin and
bushings.
If the bushings (Items 51 and 52, Fig. C.0/13)
and (Item 54, Fig. C.0/9) are to be replaced,
then remove them using a bushing puller.
When installing the new bushings be sure to
meet the specification requirements report-
ed on the Fig. C.0/13 and ream the inside
diameters, if necessary, to specifications.
3. Check the control valve spool for wear, the
correct spool and bore clearance being
0.001-0.0014 in. (0.025-0.035 mm.). If a new
spool is to be installed consider that it is not
available alone as spares as they are fitted to
their respective bores at the factory.
4. .Check sealing tightness of the drain valve as
indicated in the topic on checking the
pressure relief and safety valves. Make sure
that the sealing surfaces of the pilot valve are
free from scoring or faults and grind, if
necessary, the cast iron walls of the bore on
the hydraulic lift body.
Verify flexibility of the valve springs versus
the data reported in the table in rear of this
section.
5. Check the pressure setting of the relief valve
and of the cylinder safety valve according to
the instructions given on checking the
pressure relief and safety valves.
Hydraulics· 158