Textron JACOBSEN G-Plex II User Manual

GB-23
JACOBSEN G PLEX II Series: ZV
MAINTENANCE AND PARTS MANUAL
GB
TROUBLESHOOTING
Nothing happens when key is turned (engine won’t crank):
Direction/Speed pedal not in neutral .............................. Pedal should return to neutral automatically, if
not, check the neutral centering mechanism and
micro switches located below the hydrostat pump
Mow or Lift pedal engaged ............................................ Return the mow/lift pedal to the rear “raise” position
........................................................................................ Reel Drive Enable Switch in UP position Move switch
to ”OFF”
If the cutting heads are down, the mow raise pedal MUST be in the raised position and the reel enable
switch MUST be in the off position before the unit can be started.
Blown fuse ...................................................................... Replace fuse
Lack of power or speed:
Hydrostat pump bypass valve not completely closed ....... Turn knob counterclockwise to close valve
Engine overheating:
Air intake screen blocked or clogged with debris ........... Clean air intake screen
Oil level too low or too high ............................................ Check and correct oil level
Radiator plugged with debris .......................................... Clean radiator
Coolant level too low ...................................................... Check and correct coolant level
Hydraulic system overheating:
Air intake screen blocked or clogged with debris ........... Clean cooling air intake screen
Low oil level .................................................................... Check and correct oil level
Wrong or dirty oil ............................................................ Drain the system and refill it with fresh oil of the proper
type and replace filters.
Hydraulic system foaming:
Low oil level .................................................................... Check and correct oil level
Wrong or dirty oil ............................................................ Drain the system and refill it with fresh oil of the proper
type and replace filters
Air leaking into the system ............................................. Check suction line fittings and/or charge pump seal
Reels won’t turn:
Reel enable switch in the off position ............................. Switch the reel enable switch on
Bedknife too tight against reel ........................................ Adjust bedknife
Restriction valve knob open ........................................... Turn restriction valve knob clockwise until closed
Low hydraulic oil level .................................................... Check and correct oil level
Poor cut quality:
Dull cutting edges ........................................................... Perform backlapping operation
Bedknife out of adjustment ............................................. Adjust bedknife
Reels turning too slow..................................................... Make sure the restriction valve knob on the reel valve
is tightly closed and the bedknife is not too tight
against the reel
Ground speed too fast .................................................... Adjust the stop screw on the mow/speed control
linkage to reduce mowing speed NOTICE, do not
reduce engine speed. Always operate the unit
with engine at full throttle. Reducing engine speed will
affect hydraulic pressure and cutting quality.
Squealing noise from reel:
Bedknife out of adjustment ............................................. Adjust bedknife
Running cutting heads dry .............................................. Run heads in grass to keep cutting edges lubricated

Textron JACOBSEN G-Plex II Specifications

General

Brand	Textron
Model	JACOBSEN G-Plex II
Category	Farm Equipment
Language	English