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O R I G I N A L I N S T R U C T I O N
8. FAULT DIAGNOSIS
SYMPTOM
Tool will not place
fastener
'Mandrel Slip' - jaws will
not grip mandrel
Jaws will not release
mandrel
Fasteners will not feed
through nose jaws
Excessive tail jaw wear
Feeding more than one
fastener at a time
Other symptoms or failures should be reported to your local Stanley Engineered Fastening authorised distributor or repair centre.
POSSIBLE CAUSE
Low air pressure.
Lack of lubrication.
High broach load.
Check for correct size mandrel.
Worn or broken tail jaws.
Tail jaws switched off.
Air in hydraulic system.
Worn or dirty tail jaws.
' Insufficient air pressure/volume.
' Tail jaw switch inoperable.
' Air leaks to tail jaws.
Mandrel broken and not reaching tail jaws. Replace mandrel
Defective non-return valve.
Dirty tail jaws or jaw housing.
Faulty tail jaw switch.
Tail jaws not switched on.
Worn tail jaws.
Cursor orientation incorrect.
Incorrect nose jaws.
Mandrel follower spring not fitted.
Incorrect gap between fastener head
and nose jaws when loaded.
Cursor sticking.
Weak outer spring around cursor.
Incorrect mandrel follower spring fitted. Fit correct mandrel follower spring
High broach load.
Mandrel slip.
Incorrect gap between fastener head
and nose jaws when loaded
REMEDY
Increase air pressure
Lubricate tool at air inlet point
Check fastener grip and application hole size
New tail jaws
Switch on tail jaws
See 'Priming Procedure'
Clean or renew as necessary
Increase air pressure/volume
Replace switch
Renew 'O' Rings 10 on Piston Assembly 51
Replace non-return valve
Clean and lubricate
Replace 'O' rings
Switch on tail jaws
Renew tail jaws
Refit, ensuring correct orientation
Fit correct nose jaws
Fit correct mandrel follower spring
Set gap to 1.5mm - 3mm (1/16" - 1/8")
See 'Loading the Tool'
Clean and oil cursor
Renew cursor
Check application hole size and thickness
and fastener grip capability
Check as for 'Mandrel Slip' , stage 2
Set gap to 1.5mm - 3mm (1/16" - 1/8")
See 'Loading the Tool'
E N G L I S H
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