Gage Bilt GB745/204 Manuale - Pagina 8

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TROUBLESHOOTING

1. Check air line for correct pressure at the tool. It must be 90 to 120 psi (6.2-6.9 bar).

2. Check tool for lack of hydraulic oil (see filling instructions).

3. Check for oil leakage.

a. Hydraulic oil leaks from connections. Tighten threaded connections.

b. If oil should leak through the by-pass hole at the base of the handle (744129), quad rings (401462) is worn or damaged.

c. Oil leaking from the front of the head (204300) indicates that o'ring (403802) is worn or damaged.

4. Check for excessive air leakage from air valve.

a. If spring (744144) is broken or dislodged, air will bleed directly through the bottom of the air valve and the head piston retreat to

its full stroke without returning.

b. If o'ring (400785) on valve plug (744142) is worn or damaged, replace.

c. If o'rings (400779) on valve spool ass'y (743142) are worn or damaged, replace.

5. Check movement of piston ass'y (204203). If it does not move freely or is slow in operation:

a. O'ring (403810) may be damaged and require replacement.

b. Piston ass'y (204203) may be mechanically locked due to damaged parts.

c. Muffler (744143) or air filter inside valve spool ass'y (743142) may be blocked or damaged. Hole diameter should

be .028" (.711mm) clear and size or replace valve spool ass'y (743142).

6. Rivet stem sticks in nose assembly.

a. Nose assembly components need maintenance. Disassemble nose assembly, clean and replace worn parts.

b. Spent pintail may be jammed in nose assembly. Disassemble nose assembly, remove pintails and reassemble.

OVERHAUL

The disassembly and re-assembly procedure can be accomplished by utilizing the following instructions and drawings. Use extreme

care during disassembly and re-assembly not to mar or nick any smooth surface that comes in contact with seals. Before installing

seals, always apply a good lubricant, such as Lubriplate®, to the surfaces. A complete overhaul can be achieved by the use of

Service Kit 745204 which contains a complete set of o'rings, back-up rings, screws, washers and gasket.

756610

STEM CATCHER BAG

PISTON ROD WRENCH

WARNING

DEPRESS ACTUATOR AND DISCONNECT FROM AIR WITH HEAD PISTON IN THE REAR POSITION BEFORE OVERHAUL. SEVERE

PERSONAL INJURY MAY OCCUR IF AIR HOSE IS NOT DISCONNECTED.

DOWNWARD WITH HEAD CYLINDER ASSEMBLY REMOVED, HYDRAULIC OIL WILL EJECT FORCIBLY FROM HANDLE.

704151

POWER CYLINDER TOOL

745155

PACKING PLUG WRENCH

(756610 CATCHER BAG SHOWN ABOVE IS SOLD SEPARATELY)

GB745TK Service Tool Kit

Part No.

Description

745155

Piston Rod Wrench

704150

Packing Plug Wrench

704151

Power Cylinder Tool

704152

Seal Guide

704153

Air Bleeder Assembly

S1178

Valve Extractor

744251

Valve Spring Installation Tool

744152

Valve Sleeve Removal Tool

704152

SEAL GUIDE

704150

704153

BLEEDER BOTTLE

USE CAUTION

744251

VALVE SLEEVE

INSTALLATION TOOL

744152

VALVE SLEEVE

REMOVEAL TOOL

WHEN FORCING PISTON ROD ASSEMBLY

S-1178

VALVE EXTRACTOR

REV. 2/14