Mec 3072ES, Service And Parts Manual

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PROBLEM REMEDY/SOLUTION POSSIBLE CAUSE
October 2008 "3072ES / 3772ES / 3772ES HD" Service & Parts Manual
Page 4-32
Drive
No drive function 1 o r mo r e o u t r igge rs deployed pa r tially o r
f u lly
(o u t r igge r eq u ipped model s o n ly)
O u t r igge r s witch/ s i n ope r ative
D r ive valve n ot s hifti n g
D r ive s y s tem s h u t dow n o r i n te rru pted
Check fo r GREEN LED o n u ppe r co n t r ol box
Ope r ate o u t r igge r r et r act s witch un til elect r ic a u tomatically t urns off
Check e n able light o n platfo r m co n t r ol box
Check o u t r igge r s witche s located o n top of each o u t r igge r jack
Check s witch i n p u t s us i n g EZ-Cal (EZ-Cal ID# 2d7 – 2d10)
Check co nn ectio ns at valve
Check d r ive valve fo r co n tami n atio n
Check HELP a n d MODE me ss age o n EZ-Cal
No drive elevated
Slow drive with
Platform stowed
Drive in one direction
only
continued…
U n it o u t of level
Low batte r y Voltage
S y s tem I n te ru ptio n
Ala r m will s o un d
Lowe r a n d r epo s itio n the machi n e.
Check batte r y voltage with m u lti-mete r o r EZ-Cal.
Clea n , s e r vice, cha r ge batte r ie s .
Check HELP a n d MODE me ss age o n EZ-Cal
High to r q u e e n abled
Limit s witch n ot f un ctio n i n g
Malf un ctio n i n g r ea r wheel bypa ss valve
Wheel moto rs n ot f un ctio n i n g co rr ectly
Check S peed/To r q u e s witch o n platfo r m co n t r ol s
Check limit s witch located o n left r ea r of ba s e
Check limit s witch i n p u t with EZ-Cal (EZ-Cal ID# 2d5)
Located o n r ea r wheel s o n ly
Check by r eplaci n g valve s .
I ns pect wheel moto rs fo r exce ss ive bypa ss .
Poor gradability
performance High o r mid s peed e n abled
Batte r ie s di s cha r ged
Wheel moto rs n ot f un ctio n i n g co rr ectly
Malf un ctio n i n g r ea r wheel bypa ss valve
Malf un ctio n i n g s e r ie s pa r allel valve s
Wo rn hyd r a u lic p u mp
Check S peed/To r q u e s witch o n platfo r m co n t r ol s
Check batte r y voltage with m u lti-mete r o r EZ-Cal.
Clea n , s e r vice, cha r ge batte r ie s .
I ns pect wheel moto rs fo r exce ss ive bypa ss .
Located o n r ea r wheel s o n ly
Check elect r ical by di s co nn ecti n g valve s .
Check f un ctio n by r eplaci n g valve s .
Located o n top of mai n hyd r a u lic ma n ifold
Check with flow mete r o r r eplace p u mp.
D r ive valve S VD1 n ot e n e r gized i n o n e
di r ectio n
Co un te r bala n ce valve CBV1 o r CBV2 n ot
f un ctio n i n g co rr ectly
No o u tp u t f r om GP400
Check 12 volt s to app r op r iate coil
Check coil
Check valve f
un ctio n
S wap co un te r bala n ce valve s to s ee if f un ctio n i n g di r ectio n cha n ge s .
S ca n us i n g EZ-Cal a n d t r o u ble s hooti n g cha r t s
EZ-Cal cha r t ID# 4f-7 – FWD o r 2f-9 – Reve rs e
TROUBLE Table continued