Great Plains 2510HDP Operator Manual - Manual (Page 98)

94 1510HDP/2010HDP/2510HDP Table of Contents Index Great Plains Manufacturing, Inc.
118-245M Table of Contents Index 2013-10-21
Hydraulic Drive Troubleshooting
Drive will not rotate:
(see Troubleshooting Flow Chart and Electronics Over-
view)
1. Check cab console:
a. No power to cab console - check with voltmeter.
b. Upper line (set) is visible but no lower line (out
rate and speed) on display: move to Communi-
cation troubleshooting below.
c. 1 or 10 amp fuse on power cable may be blown.
d. Engage button is not on - check to see if green
indicator light is on.
e. Use Cab Console Power Tester (p/n 27857) to
check power out of cab console. Install tester on
round 7-pin power/com cable from cab console.
Turn drive on. Green LED shows power to exter-
nal controller. Red LED shows power to sole-
noid. If LED lights are not lit, double-check power
and connections; replace cab console if needed.
2. Check communication between cab console and
drive:
a. Check to see if power and communication cable
(main harness) is properly connected.
b. If no lower line on cab console appears (speed
and output rate), and drive will not rotate in cali-
bration mode, use Cable Continuity Tester (p/n
27859) to test power and communication to
external controller. (WARNING: TO PREVENT
DAMAGE TO COMPONENTS, DISCONNECT
POWER/COM CABLE FROM CAB CONSOLE
AND EXTERNAL CONTROLLER BEFORE
INSTALLING THIS TESTER). Install 4-pin test
plug on end of 4-pin power/com cable before
powering the Cable Continuity Tester - remove
before reattaching power/com cable directly to
cab console.
c. If Cable Continuity Tester shows power is getting
to external controller, turn power off and remove
Cable Continuity Tester and 4-pin test plug from
ends of power/com cable. Reattach power/com
cable to cab console and external controller.
d. If power/com cable tester shows power and com-
munication is reaching external controller from
cab console, and no lower line appears on cab
console, replace chip or external controller. Call
Service Department.
e. If Cable Continuity Tester (p/n 27859) isn’t avail-
able, check cable with voltmeter at connection at
control module.
3. Test Relay inside external controller:
a. Use Relay Output Tester (p/n 27860) to test relay
inside external controller. Install tester to
weather-pak solenoid connector from external
controller. With tractor engine off, start drive cali-
bration function. Auditory alarm should buzz for
1.5 seconds when drive is engaged in calibration
mode. If alarm does not sound, relay or external
controller may need to be replaced. Call Service
Department.
4. Check hydraulics:
a. Check to see if hydraulic lever is in detent posi-
tion.
b. Hydraulic lever is in wrong detent direction - a
check valve at outlet of motor prevents reverse
rotation.
c. Make sure that both hoses are properly con-
nected to tractor remotes.
d. Inadequate system pressure. Place pressure
gauge at filter and check reading. If system pres-
sure is below tractor specifications, check sys-
tem.
e. Power solenoid directly:
Rapid drive rotation may occur and cause serious
injury.
i. Disengage hydraulics.
ii. Reduce flow to 30-50%.
iii. Power solenoid directly by connecting power
weather-pak connector to solenoid
weather-pak connector. If drive doesn’t
rotate, Proportional Coil (p/n 19799) may be
defective. Check continuity with meter, or
energize with 12v power and check for mag-
netic pull with small screwdriver. Dou-
ble-check connections on solenoid cable. If
solenoid energizes but drive does not rotate
when powered directly, tractor hydraulics are
not properly engaged.