Mercedes-Benz Unimog Operating Instructions Manual page 338

Jump-starting, tow-starting and towing away
336
U 423 / U 427 / U 430 / U 527 / U 530
Overview
Spring-loaded parking brake cylinder for parking
and service brake
Releasing the spring-loaded parking
brake cylinders manually
! Undo the release bolt with a maximum
torque of 70 Nm. Do not use an impact
wrench. You could otherwise damage the
spring-loaded parking brake cylinder.
X
Use chocks to safeguard the vehicle
against rolling away.
X
Unscrew release screw : of left and right-
hand side spring-loaded parking brake cyl-
inder ; as far as possible (release posi-
tion).
Returning the spring-loaded parking
brake cylinders to the operational condi-
tion
X
Make sure that the J warning lamp in
the instrument cluster is not lit.
The vehicle's compressed air system has
sufficient reservoir pressure.
X
Release the parking brake (
X
Screw in and tighten release screw : of
left and right-hand side parking brake cyl-
inder ; (brake position). Tightening tor-
que 40 to 50 Nm.
Y page 166).