out relay is working, then reattach to terminal
#1. If crane still does not operate, pull socket
off relay. Find where wire from cord reel
feeds into relay socket. Jumper from this
terminal of socket to ground. If crane
operates, replace relay. If crane still does not
operate, then check continuity through cord
reel and two-block switch.
3 HOIST FAILS TO OPERATE IN EITHER
DIRECTION BUT ALL HYDRAULIC
FUNCTIONS OPERATE.
A.
Listen for relay click for hoist up and hoist
down. If relay doesn't click check for voltage
at left side control terminal(small) when
function is selected, if no voltage then use
procedure for checking receptacle and
pendant given in 1.C.
B.
Check terminal A2 of hoist motor for power
when operating either hoist up or hoist down.
If there is voltage but motor does not try to
run or get hot then motor is bad. If motor
tries to run or gets hot then voltage reading at
A2 will be less than 12 volts and motor may
be dirty or have oil in it from failed oil seal.
C.
If there is no power at A2 only on hoist up,
then put test light across bottom power termi-
nals of hoist down relay. If light comes on
when hoist up is picked, then hoist down relay
is bad. If test light doesn't light, put light
across upper power terminals of hoist up relay
and pick hoist up. If light comes on, replace
hoist up relay.
D.
If there is no power at A2 only on hoist down
then put test light across bottom power termi-
nals of hoist up relay. If light comes on when
hoist down is picked, then hoist up relay is
bad. If test light doesn't light, put light across
upper power terminals of hoist down relay
and pick hoist down. If light comes on,
replace hoist down relay.
NOTE:
THERE ARE OTHER WAYS TO
TEST FOR CIRCUIT CONTINUITY SUCH AS
USING VOLT METER OR TEST LIGHT AND
FOLLOWING CIRCUIT THROUGH BY
TESTING AT EACH POINT FOR VOLTAGE
TO GROUND.
4 ALL HYDRAULIC FUNCTIONS
INOPERABLE.
A.
Pump does not run, pump relay does not
click. Jumper from upper left power terminal
of pump relay to left side relay control termi-
nal. If relay doesn't click, replace relay. If
relay clicks and pump runs, check receptacle
and pendant. (see 1.C.)
B.
If relay clicks but pump doesn't run, check for
voltage at pump motor terminal. If no voltage
replace pump relay. If voltage is present,
pump motor is bad or pump is locked. If
pump is locked motor will get hot and voltage
at motor terminal will much lower than 12
volts.
5 PUMP RUNS BUT SINGLE HYDRAULIC
FUNCTION DOESN'T WORK.
A.
Select inoperable function with pendant
switch and push manual override of valve in
question-if function works use procedure 1.C.
to check receptacle and pendant. If recepta-
cle checks out and function can not be run by
using jumper at receptacle, then valve or
harness may be bad. Check for 12 volt at
valve junction box. If no voltage present-
check for loose wire at back of receptacle or
terminal strip.
B.
If voltage is present at valve, then valve may
be bad. This can be checked by swapping
32trbl 2/99
TROUBLESHOOTING GUIDE
3203 PRX
6-8.1.0
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