TM 9-2350-256-20
CHAPTER 2: VEHICLE MAlNTENANCE INSTRUCTlONS
2-17 HYDRAULIC TROUBLESHOOTING-Continued
SPADE
SYMPTOMS
Spade fails to operate.
Do steps A through F.
Spade operates with difficulty.
Spade creeps.
Do steps A through H.
Do steps G and H.
NOTE
The spade troubleshooting procedures are
performed using the main hydraulic system
as a fluid power source. If spade operates
using main hydraulic but not auxiliary
hydraulic, troubleshoot auxiliary hydraulic
system. If spade operates using auxiliary
h y d r a u l i c b u t n o t m a i n h y d r a u l i c ,
troubleshoot main hydraulic system.
A Attempt operation of the hoisting boom, hoist
winch, and main winch. If hoisting boom, hoist
winch, and main winch do not operate, troubleshoot
main hydraulic system and/or auxiliary hydraulic
system. If hoisting boom, hoist winch, and main
winch operate go to step B.
Do not attempt to Ioosen or tighten
hydraulic fittings or lines when system is
pressurized. Severe injury or death to
personnel may result.
B Inspect hydraulic lines and connections for leaks.
Replace leaking hydraulic lines and tighten leaking
connections (see paragraph 12-1). If leaks persist,
notify Direct Support Maintenance.
If no leaks
persist go to step C.
Do not attempt to loosen or tighten
hydraulic fittings or lines when system is
pressurized. Severe injury or death to
personnel may result.
C Visually inspect for any indication of oil leakage at
spade cylinders, spade release cylinder, and cylinder
hydraulic connections. If oil leaks cannot be stopped
by tightening fittings, notify Direct Support
Maintenance. If oil leaks are not present, go to step
D.
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