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C) Reposition the head spacer and the head on the casing.
D) Fasten the header tightening the M12x220 screws.
For the values of the torques and tightening sequences follow
the instructions contained in chapter 3.
2.2.8
Piston spacer disassembly (SWS71)
The piston spacer does not require any routine maintenance.
Maintenance is limited to visual checks only.
Proceed as follows to extract:
A) After having removed the head and the head spacer, free
the spacer as indicated in Fig. 31.
B) Check and verify their wear conditions, replace if
necessary.
2.2.9
Piston spacer reassembly (SWS71)
A) Fit the spacer (Fig. 32) and tighten on the piston guide rod.
In the event that replacement is being carried out
with the wiper already assembled, lubricate the
bush and take care, during insertion, not to damage
the wiper seal lip.
For the tightening torques, follow the instructions in chapter 3.
3
SCREW TIGHTENING CALIBRATION
Description
Bearing Cover Fixing Screw
Oil drain plug
Lifting bracket fixing screw
Con-Rod Cap Fixing Screw
Fig. 30
Piston guide rod fixing
screws
Piston Fixing
Head Fixing Screw
Valve Cover Fixing Screw
"A" type Flange Fixing Screw
Fixing Screw Coupl. SAE C
2nd PTO Flange Fixing
Screw
Screw Fixing Cov. Red.
Red.Gear Fixing Screw
Red.Gearbox Fixing Screw
Stud Bolt M7
Piston spacer
*
The con-rod cap fixing screws must be tightened
respecting the phases indicated on page 18.
**
The head fixing screws must be tightened with a
torque wrench, lubricating the underhead, respecting
the order in Fig. 33.
***
The valve cover fixing screws must be tightened
with a torque wrench, lubricating the underhead,
respecting the order in Fig. 33.
**** The PTO 2nd flange fixing screw must be tightened
Fig. 31
with a torque wrench, using Loctite 243 Blue.
***** The stud bolt M7 exploded view pos. 33, is to be
mounted on the spacer exploded view pos. 31 with
Loctite 243 code 12006400.
Fig. 32
24
Exploded
Exploded
Tightening
view
view
torque Nm
position
position
SWS71
9
53
10
11-88
16-97
40
61
66
40
16
47
30*
96
68
10
29
18
20
38
35
60**
39
13
120***
63
83
40
70
91
40
75
88
360****
77
91
40
82
104
70
77
91
40
-
10*****
33
-
20
31
Fig. 33
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