MLS MMLS3, Operator'S Manual

Page: 33 / 48

MLS Test Systems Pty Ltd
Revised: April 2013
31
4.5.8 Replace the wheel in the bogie and tighten nuts A & B. Move
the circlip back in place. Replace plate G and tighten
capscrews, F, to 20 Nm. Tighten nuts A & B as hard as you
can (100 Nm).
4.5.9 Replace the springs.
4.6 Removing and replacing the springs
Refer to fig. 2.
Springs that are not in the machine are compressed by a spacer
and a M16 nut (nut A) on the spring shaft. AFTER A SPRING
HAS BEEN INSTALLED IN THE MACHINE THE NUT
AND SPACER MUST BE REMOVED and saved for later use.
Open one of the safety covers on top of the machine and move
the bogie to be worked on into an easily accessible position.
TO AVOID INJURY WHEN MOVING IT BY HAND, ONLY
HANDLE IT BY THE ROUND AXLES OF THE LINK
SECTIONS.
Take a spare spacer and apply some MS grease to the thread of
the spring shaft and spacer face and push the spacer over the
open end of the shaft, small end first, followed by a M16 nut
(see fig. 2). NEVER USE A STAINLESS STEEL NUT,
because it will seize onto the shaft. Using a 24mm ring wrench,
tighten the nut until the spring has been compressed by about
3mm and the load is taken off the hinge pin. Using circlip
pliers, remove the circlip on the pin and pull out the pin. Lift
out the spring assembly.
Replace the spring in the reverse order. Apply some grease to
the pin before replacing it. Make sure that the protrusion on the
flange slips into the circular recess in the spring support.