Gage Bilt GB705NAST Manual - Page 7

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TROUBLE SHOOTING

Providing all maintenance conditions have been met, follow this systematic approach to diagnosis.

1. NO OPERATION WHEN ELECTRIC ACTUATOR IS DEPRESSED

a.) Check Powerunit power source.

b.) Control cord may be loose or damaged.

c.) Faulty electric actuator. Replace.

d.) Check hydraulic couplings; tighten, repair or replace.

2. SLOW OR PARTIAL OPERATION WHEN ELECTRIC ACTUATOR IS DEPRESSED

a.) Low hydraulic pressure. Check powerunit, adjust.

b.) O'ring (403810) 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

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.) Tool must be pushed onto fastener fully.

b.) Chips may have collected in chuck jaws. Disassemble nose assembly, clean jaws in mineral spirits or use a

sharp pointed object to remove chips. Re-lube surfaces jaws ride on

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

WARNING:

DISCONNECT TOOL FROM ITS POWER SOURCE BEFORE PERFORMING OVERHAUL

If a tool is performing poorly or leaking badly, a complete overhaul may be necessary. Service Kit 206100 contains a

complete set of o'rings, back-up rings and screws.

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® (Gage Bilt part no. 402723) or other lubricant is recommended during reassembly to

prevent tearing or distorting of o'rings.

Disconnect hydraulic hoses and electrical cord from powerunit. Remove hydraulic coupling ass'y (585037) from

reducing bushing (403431) and drain. Push piston ass'y (707308) back into cylinder (700338) to empty all fluid from

tool. Push piston ass'y (707308) back to the front of cylinder (700338).

Unscrew screw (206118) from retaining ring (206117) using a spanner wrench to remove retaining ring (206117). Push

piston back until cylinder cap ass'y (206115) falls out of cylinder. Push piston ass'y (707308) out the rear of the cylin-

der. Remove unloading valve (206109) from the piston. Using a small blunt object, remove o'rings and back-up rings

from components.

Clean parts in mineral spirits or other o'ring compatible solvent being sure to clean o'ring grooves. Inspect compo-

nents 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 parts list. Unloading valve must be installed with flats towards the rear and must enter

notch in the rear of adapter. Coat hose fitting threads with a non-hardening Teflon thread compound such as

Slic-tite® (Gage Bilt part no. 403237).

DO NOT USE TEFLON TAPE.

(See hydraulic thread preparation page 5)

tape.

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