TROUBLE SHOOTING
Providing all maintenance conditions have been met, follow this systematic approach to diagnosis.
1. NO OPERATION WHEN TRIGGER IS DEPRESSED
a.) Check Powerunit power source.
b.) Control cord may be loose or damaged.
c.) Faulty trigger. Replace.
d.) Check hydraulic couplings; repair or replace.
2. SLOW OR PARTIAL OPERATION WHEN TRIGGER IS DEPRESSED
a.) Low hydraulic pressure. Check powerunit, adjust.
b.) Cylinder Piston O'Ring (20) could be worn or damaged. Replace.
c.) Excessive wear or scoring on moving parts. Check and replace faulty parts.
3. TOOL OPERATES IN REVERSE
a.) Tool stops in back position. Hydraulic hoses are reversed. Correct.
4. HYDRAULIC OIL OVERHEATS
a.) Powerunit motor rotation reversed. Electrical connections reversed. See powerunit instruction manual.
b.) Restrictions in either hydraulic lines, hoses or couplings. Check and tighten, clean or replace.
5. OIL LEAKAGE
a.) Hydraulic oil leaks from connections. Tighten threaded connections. Do not use teflon tape.
b.) Oil leaks from tool. Determine source of leak and replace worn or defective O'Rings and back-up rings.
6. PINTAIL GROOVES STRIPPED DURING PULL STROKE
a.) Nose Assembly must be pushed onto fastener fully.
b.) Chips may have collected in chuck jaws. Disassemble nose assembly, clean jaws in mineral spirits using a sharp
pointed object.
c.) Chuck jaws may be worn or damaged. Replace.
d.) Pintail too short for jaws to properly grip. Select proper grip length fastener.
e.) Excessive gap between sheets. Reduce gap before attempting to install fastener.
7. NOSE ASSEMBLY WON'T ACCEPT FASTENER PINTAIL
a.) Spent fastener stem may be jammed in pulling head. Disassemble and check for worn or broken parts in nose assembly.
Replace defective parts and clean before reassembling.
OVERHAUL
If a tool is performing poorly or leaking badly, a complete overhaul may be necessary. Service Kit 750011 contains a
complete set of O'Rings, back-up rings and screws.
GBP7500ATK is recommended, it contains special tools needed for complete tool overhaul.
Perform overhaul in a clean, well lit area using care not to scratch or nick any smooth surface that comes in contact with
an O'Ring. Use of Lubriplate (GBP part no. 402723) or other lubricant is recommended during reassembly to prevent tearing
or distorting of O'Rings.
Disconnect hydraulic hoses (35) and electrical cord (37) from powerunit. Remove couplers (36) from hoses (35) and drain.
Remove nut (1) and nose assembly. Using wrench (750150) remove adapter (4). Using wrench (750151) remove spanner nut
(5). Remove retaining ring (29) and dust cover (28). Push piston assembly (21) rearward to expose retainer-piston (26) and
retaining ring (27) around rear piston (25). Remove retaining ring (27) and retainer-piston (26) to remove rear piston (25). Push
front gland (18) and piston assembly (21) out front of cylinder (22), rear piston will disengage.
To remove hoses, remove couplers (36), remove socket head cap screws (32) and slide handle (33) off.
Clean parts in mineral spirits or other O'Ring compatible solvent being sure to clean O'Ring grooves. Inspect components
for scoring, excessive wear or damage.
Reassembly sequence is opposite of disassembly. Be sure relative positions of O'Rings and back-up rings are as shown
in exploded view and part list. Relief valve must be installed with four flats towards the rear of the cylinder. Coat hose fitting
threads with a non-hardening teflon thread compound such as Slictite (GBP part no. 403237). DO NOT USE TEFLON TAPE.
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