JLG 680S, Service And Maintenance Manual

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SECTION 4 - BOOM & PLATFORM
3121234 4-53
Tools Required for Assembly/Disassembly
Upon assembly and disassembly of the actuator there are basic
tools required. The tools and their intended functions are as fol-
lows:
1. Pipe Vise
2. Hex Wrench - Removal and replacement of port plugs
and set screws.
3. Assorted Screws
4. Safety Glasses
5. End Cap Removal Tools
6. Drill
7. Flashlight - Helps in locating and examining timing
marks, component failure and overall condition.
8. Rubber Mallet - Removal and installation of shaft and
piston sleeve assembly.
9. Plastic Mandrel
10. Pry Bar - Removal of end cap and manual rotation of
shaft.
11. Felt Marker- Highlights timing marks and outlines trou-
bled areas. Permanent ink is recommended.
12. T - Handle Screw Extractor
13. Hex Wrench Set - Removal and replacement of port
plugs and set screws (106,110).
14. Seal Tools - Removal and installation of seals and wear
guides. Directions on making a seal tool are provided at
bottom.
15. Punch
16. Dowel Pins - Removal and installation of end cap.
Making a Seal Tool
The seal tool is merely a customized standard flat head screw-
driver.
TO AVOID INJURY BE CAREFUL WHILE HANDLING THE HOT SCREWDRIVER.
1. Heat the flat end with a torch until it glows.
2. Secure the heated end of the screwdriver in a vise and
bend the heated end to a slight radius.
3. Round off all sharp edges of the heated to a polished fin-
ish. The tool may be modified slightly to one’s own per-
sonal preference. To avoid injury be careful while
handling the hot screwdriver.
Before Disassembly
Inspect the actuator for corrosion prior to disassembly. Severe
corrosion can make it difficult to remove the lock pins (109) and
unthread the end cap (04). If corrosion is evident, soak the lock
pins and end cap with penetrating oil for several hours before
disassembly.
Disassembly is considerably easier if the actuator is firmly
secured to the work bench. A pipe vise or mounting fixture work
well.
6.
1.
2.
3.
4.
8.
7.
9. 10.
5.
11.
12.
13.
14. 15.
16.