Bobcat MT55 - Quick Couplers; Relieve Hydraulic Pressure (Mini Track Loader And Attachment)

31 MT55 Operation & Maintenance Manual
HYDRAULIC CONTROLS (CONT’D)
Quick Couplers
WARNING
AVOID INJURY OR DEATH
Diesel fuel or hydraulic fluid under pressure can
penetrate skin or eyes, causing serious injury or
death. Fluid leaks under pressure may not be visible.
Use a piece of cardboard or wood to find leaks. Do
not use your bare hand. Wear safety goggles. If fluid
enters skin or eyes, get immediate medical attention
from a physician familiar with this injury.
W-2072-0807
Figure 22
To Connect: Remove dirt or debris from the surface of
both the male and female couplers, and from the outside
diameter of the male coupler. Visually check the couplers
(Item 1 and 2) [Figure 22] for corroding, cracking,
damage, or excessive wear. If any of these conditions
exist, the coupler(s) must be replaced.
Install the male coupler into the female coupler. Full
connection is made when the ball release sleeve slides
forward on the female coupler.
To Disconnect: Hold the male coupler. Retract the sleeve
on the female coupler until the couplers disconnect.
Relieve Hydraulic Pressure (Mini Track Loader And
Attachment)
WARNING
AVOID BURNS
Hydraulic fluid, tubes, fittings and quick couplers
can get hot when running machine and attachments.
Be careful when connecting and disconnecting quick
couplers.
W-2220-0396
Figure 23
Mini Track Loader:
• Lower the lift arms fully and put the attachment flat on
the ground. Stop the engine. Engage the parking
brake.
• Move the Auxiliary Hydraulic Control Lever (Item 1)
[Figure 23] forward and backward to release
auxiliary hydraulic oil pressure.
Attachments:
• Follow procedure above to release pressure in the
mini track loader.
• Connect male coupler from attachment to female
coupler of the mini track loader then repeat procedure
above. This will release pressure in the attachment.
• Connect the female coupler from the attachment to
the male coupler of the mini track loader.
Hydraulic pressure in the auxiliary hydraulic system can
make it difficult to engage quick couplers to an
attachment.
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