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Instruction Manual - RIV939P
8 - FAULT DIAGNOSIS
8.1 - POSSIBLE FAULTS
ISSUE
REMEDY
Traction is not correctly performed. It lacks oil (see section 7.3.1)
Unscrewing is not correctly
performed.
If unscrewing is not correctly performed when inserting the rivet nut in the tie rod, and after
pressing the trigger (A), there may not be enough oil. In this situation, add oil.
Unscrew without traction.
Or (B) broken: replace it.
Slows the unscrewing after
traction.
Working intensely, it loses greasing and tends to harden.
Remove the piston (G) and grease.
Replacing parts of the manostat.
When you must work on the manostat:
1. Remove air
2. Loosen the oil cap (27) to avoid the coming out of gasket (C). In case of replacement,
use guide. (1) Insert the gasket (2) and push it with the pin (3). If after reassembling of all
parts of the pressure switch, it does not work properly, o-rings (O1, O2, O3) have not been
correctly assembled:
O-ring (O2), when broken unscrews without making traction
O-ring (O3) makes traction but no unscrew
O-ring (O1) can leak air
Consequently, we recommend replacing all 3 o-rings (ORM 15x1) of the kit (ref.41) code
4157200
O-ring Code 4371800
B
G
A
S
B
O-ring Cod. 4371800
01
02 03
1
2
3
C
