Trinity Highway INGAL SS180 M, Assembly Manual

Page: 35 / 65

trinityhighway.com 34 Revision A November 2019
Hydraulic Cylinder
Warning:
Never allow anyone underneath the moving portion of the SS180
®
M.
Block out all loads and disconnect electrical contact prior to performing any service
on hydraulic equipment.
1. Troubleshooting
If you suspect problems with the hydraulic cylinder on the TMA, you may need to remove the
cylinder from the TMA for repair or replacement. The cylinder can only be removed when the
TMA is completely folded. Double check all electrical contacts between the TMA and support
vehicle have been disconnected prior to performing any work on the hydraulic system.
A cracked, bent, or leaky cylinder may need repair but will almost always be replaced to ensure
reliable performance.
2. Cylinder Replacement
A. Completely fold the TMA.
B. Unplug all electrical connections between the TMA and the support vehicle.
C. See Hydraulic Cylinder Assembly drawing on page 51. Loosen (but do not disconnect) the
“Follower Link Pivot” and the “Push Link Pivot” where they are bolted to the “Weldment,
Front Intermediate Frame” and the “Weldment, Rear Intermediate Frame”, respectively.
D. At the top end of the cylinder rod, loosen the set screw and push out the short 1” diameter
pin, making note of the alignment and location of all linkage components for later
reassembly.
E. Disconnect the hoses leading into the cylinder at two convenient locations and place
temporary caps on hoses and cylinder ports to prevent spillage or contamination.
F. At the bottom end of the Cylinder body, remove the Cotter Pin from the Clevis Pin and
push out the long 1” diameter pin, making note of the alignment and location of all
components for later reassembly.
G. The cylinder should now be free. Reinstall a new cylinder in the reverse order of these
removal steps, making sure to properly align and (where necessary) tighten all
components. Use blue thread locker (medium strength) on all fasteners.
Note:
See the section on Hydraulic System Priming (p. 34). You will likely need to prime
the system if you are installing a new or “dry” cylinder.
3. Repairing Cylinder
Replace any faulty or damaged cylinder with a new cylinder.