BOOM DOES NOT TELESCOPE IN OR TELESCOPES IN SLOWLY.

TM 9-2320-364-34-1

2-15. MATERIAL HANDLING CRANE TROUBLESHOOTING (CONT).

11. BOOM DOES NOT TELESCOPE IN OR TELESCOPES IN SLOWLY.

INITIAL SETUP

Materials/Parts - Continued

Tools and Special Tools

Pin, Cotter (2) (Item 417, Appendix E)

Tool Kit, General Mechanic

(Item 240, Appendix F)

References

Cap and Plug Set (Item 26, Appendix F)

TM 9-2320-364-10

Pan, Drain 4 gal (Item 144, Appendix F)

TM 9-2320-364-20

Pressure Test Kit (Item 165, Appendix F)

Lifting Device (Minimum Capacity

Equipment Condition

200 lbs/91 kg)

Engine OFF, (TM 9-2320-364-10)

Parking brake applied, (TM 9-2320-364-10)

Materials/Parts

Wheels chocked, (TM 9-2320-364-10)

Oil Hydraulic (Item 34, Appendix B)

Outriggers down with weight off

Tags, Identification (Item 72, Appendix B)

vehicle suspension, (TM 9-2320-364-10)

Lockwasher (4) (Item 282, Appendix E)

Packing, Preformed (9) (Item 337, Appendix E)

Packing, Preformed (8) (Item 396, Appendix E)

Packing, Preformed (3) (Item 398, Appendix E)

START

KNOWN INFO

TEST OPTIONS

WARNING

Read WARNING

Unit Troubleshooting

Flowmeter test.

on Page 2-549

tasks completed.

Boom telescopes out.

REASON FOR QUESTION

Are 6 gpm (23 lpm) or more

If TELE valve on four valve bank

POSSIBLE PROBLEMS

measured from TELESCOPE

is faulty, pressure and flow to

(TELE) valve with valve

telescope cylinders will be

Four valve bank faulty.

restricted.

isolated from telescope

Telescope cylinder faulty.

cylinders?

Repair four valve

bank (Para 16-26).

Verify repair, go to

Step 5 of this Fault.

YES

2-548