Technical Zone

A little bit of care goes a long way

In this page, we would like to show you some of the simple things you can do to keep the efficiency and reliability of your machinery at the optimum. There are no big secrets to it – just a few simple procedures that are well worth remembering.


—— Keys for Trouble-Free Operation of Wrap System
Belt clearance; belt condition and tracking
Front wrap floor belts – two key checks
Wrap feeding path around lower gate roller is not impeded
Wrap rolls must be lowered for harvesting
Wrap clutch must be operating correctly
Check wrap leader after daily cleaning of machine
Outer RMB belts should have a distance of 19mm (.75”) or less from the wall of baler to avoid the potential to damage the wrap during the wrapping process. It is recommended that the rear wrap guides (A) be in outermost position as shown.



Daily inspection of the belt condition, specifically related to tracking is important:

● A belt tracking badly (as shown to right) can fold over and bend or break lace pins, resulting in further damage.

Belts tracking hard against guides should be corrected.

Refer to owners manual for instructions to correct this condition.

During daily service a good practice is to inspect belts while gate is in handler.



—— Wrap Related Alerts in Cab
"Wrap misfeed detected. Wrap dispensed exceeds total wrap length."
"Multiple wrap detected. Confirm wrap separation completed."
"Wrapping halted - wrap length not found. Wrapping halted. Measured wrap length not as expected."

Machine Logic:

Wrap length dispensed was greater than length of one wrap.

Machine Response:

Wrap feeding stopped. De-activate Auto Mode.

Potential Issue:

Separation label not seen by sensor. Could indicate wrap did not feed or tore during feeding and wrapped rubber roll, or speed not reading correctly.


STOP and inspect. Complete wrap with manual or service wrap mode.


Based on the speed sensor input, the machine calculates the length of wrap fed into the chamber, and slows down approximately 2 meters before the separation tag is expected.


—— Wrap Troubleshooting
Loose cover-edge
Wrapped rubber roller
Intermittent damage to the tacky wrap
Inadequate or no cover-edge
Edge tear
Wrap torn dramatically


Potential Cause:

Wrap rolls not lowered, resulting in the wrap not being adequately stretched to create the cover-edge.


What to do:

Insure rolls are down and pin is in the zone indicated by the decal. (A)

Inspect wrap roll mechanism. With no roll of wrap in feeding position, lower upper rolls and verify no air gap between upper two rolls and lower roller. If gap is found, this suggest debris could be in the slots of the wrap box side sheets. Inspect and clean.

Wrap not being adequately tensioned. Wrap speed should be approximately 237 RPM during feeding, slowing to approximately 100 RPM during separation. This can be monitored on the armrest display unit in the cab. If HIGHER speeds than these are observed, this suggests:

Clutch malfunction. Slipping between armature plate and coil on sheave.

Belt drive between the RMB and wrap clutch slipping. Tighten belt.


NOTE: Decal shown is on MY12 and later machines. This is available for installation on earlier machines. Contact your JD dealer for decal N406903.


—— Reporting Field Issues
Details on the SN of the tag

This information is also duplicated on each RFID tag:

Unique RM Serial Number

First 2 digits =Year of Manufacture

Portion number

When reporting an issue, please ensure that both serial and portion numbers are included.