37
F a u l t D i a g n o s i s
Tool will not place
Low air pressure.
Increase air pressure
fastener
Lack of lubrication.
Lubricate tool at air inlet point
High broach load.
Check fastener grip and application
hole size
Check for correct size mandrel.
Worn or broken tail jaws.
New tail jaws
Tail jaws switched off.
Switch on tail jaws
Air in hydraulic system.
See ‘Priming Procedure’
36
‘Mandrel Slip’ -
Worn or dirty tail jaws.
Clean or renew as necessary
jaws will not grip
’ Insufficient air pressure/volume.
Increase air pressure/volume
mandrel
’ Tail jaw switch inoperable.
Replace switch
’ Air leaks to tail jaws.
Renew ‘O’ rings on piston
8
Mandrel broken and not reaching tail jaws.
Replace mandrel
Defective non-return valve.
Replace non-return valve
Jaws will not
Dirty tail jaws or jaw housing.
Clean and lubricate
release mandrel
Faulty tail jaw switch.
Replace ‘O’ rings
Fasteners will not
Tail jaws not switched on.
Switch on tail jaws
feed through nose
Worn tail jaws.
Renew tail jaws
jaws
Cursor orientation incorrect.
Refit, ensuring correct orientation
Incorrect cursor
Fit correct cursor
Incorrect nose jaws.
Fit correct nose jaws
Mandrel follower spring not fitted.
Fit correct mandrel follower spring
Incorrect gap between fastener head
Set gap to 1.5mm - 3mm (
1
/
16
” -
1
/
8
”)
and nose jaws when loaded.
See ‘Loading the Tool’
10
Cursor sticking.
Clean and oil cursor
Weak outer spring around cursor.
Renew cursor
Incorrect mandrel follower spring fitted.
Fit correct mandrel follower spring
Excessive tail jaw
High broach load.
Check application hole size and thickness
wear
and fastener grip capability
Feeding more than
Mandrel slip.
Check as for ‘Mandrel Slip’, stage 2
one fastener at a
Incorrect gap between fastener head
Set gap to 1.5mm - 3mm (
1
/
16
” -
1
/
8
”)
time
and nose jaws when loaded
See ‘Loading the Tool’
10
Other symptoms or failures should be reported to your local Avdel authorised distributor or repair centre.
S y m p t o m
P o s s i b l e C a u s e
R e m e d y
P a g e R e f
Summary of Contents for 0753 MkII
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