Terex TM, TM85, TM125, TM105, TM100 Series Manual

Tech Tips

Service Call:

How to use the Manual Letdown on the
TM series

Tools Required:

7/8’’ wrench (supplied with unit)
Jack handle (supplied with unit)

Model(s):

TM85, TM100, TM105, and TM125

Tech-Tip 57 1 Released: 1/9/2019

Tech Tips

Tech Tip Safety Rules

Danger

Failure to obey the instructions and safety rules in the appropriate
Operator's Manual and Service Manual for your machine will result in
death or serious injury. Many of the hazards identified in the operator’s
manual are also safety hazards when maintenance and repair
procedures are performed.

Do Not Perform Maintenance Unless:

• You are trained and qualified to perform maintenance on this
machine.

• You read, understand and obey:

o manufacturer’s instructions and safety rules
o employer’s safety rules and worksite regulations
o applicable governmental regulations

• You have the appropriate tools, lifting equipment and a suitable
workshop.

The information contained in this tech tip is a supplement to the service
manual. Consult the appropriate service manual of your machine for
safety rules and hazards.

Tech-Tip 57 2 Released: 1/9/2019

Tech Tips

Step 1

Assess the boom position and identify any
obstructions. Remember when using the manual
letdown, the lowering of the upper boom, lower
boom, and the lower boom extension are all
done by gravity alone. None of the interlock
systems will operate. The platform will not level
as the booms are lowered. Plan the movements
required to get the platform to the ground before
using the manual letdown system.

The unit can be rotated using a hex fitting on top
of the rotation motor.

The manual letdown will not extend or retract the
upper boom or the Jacks.

Only use one function at a time when using the
manual letdown system.

Once the manual letdown system has been
activated, all four of the letdown controls must
be returned to neutral to stop the motion of the
boom.

The platform will not level when using the manual letdown.

Tech-Tip 57 3 Released: 1/9/2019

Tech Tips

The safety limit systems are not operational when using the

Step 2

When the manual letdown is used, none of the
safety limit systems are operational. Unless the
unit needs to be rotated to clear obstacles,
proceed to Step 3 to retract the lower boom.

If the platform or the boom is near any obstacles
and needs to be rotated away before lowering
the unit, rotate it by turning the far right knob to 3
o’clock.

manual letdown.

Tech-Tip 57 4 Released: 1/9/2019