TM 9-2320-366-34-1
2-1092
KNOWN INFO
KNOWN INFO
TEST OPTIONS
REASON FOR QUESTION
Faulty thermal relief valve
or mast erection cylinder
will cause mast to not erect
or stow properly.
2.
3.
YES
Does mast remain erect
under load?
YES
NO
Holding Valve Check
TEST OPTIONS
REASON FOR QUESTION
Replace erection cylinder (para 16-8).
NO
Mast Erection Cylinder
Visual Inspection
Replace erection cylinder (para 16-8).
Replace erection cylinder (para 16-8).
POSSIBLE PROBLEMS
POSSIBLE PROBLEMS
Is erection cylinder
leaking?
Faulty thermal relief valve.
Faulty erection cylinder.
Hydraulic oil level OK.
Hydraulic hoses, tubes,
and fittings OK.
Control valve OK.
Holding valve OK.
Faulty holding valve.
Faulty thermal relief valve.
Faulty erection cylinder.
Hydraulic oil level OK.
Hydraulic hoses, tubes,
and fittings OK.
Control valve OK.
Faulty holding valve will
cause erection cylinder
to drift down.
l4. M1084/M1086 MATERIAL HANDLING CRANE (MHC) MAST DOES NOT ERECT OR STOW (CONT)
