Specifications

© 2002 Alamo Group Inc.
Parts Section -153
Triumph Sickle Bar (Archive Book) 10/02
SHOE LEDGER PLATES:
Inner and outer shoe ledger plates are attached with rivets. These ledgers can also be replaced without
removing the shoe.
1. Shear off the old rivets by a sharp blow with a hammer at the edge of the plate.
2. Scrape dirt off the shoe mating face.
3. Install new ledger plate and rivets. Make sure they are TIGHT.
ATTENTION: Loose ledger plates can cause poor cutting and destroy otherwise usable
knives, guards, and shoes. KEEP LEDGERS TIGHT.
PITMAN:
(2500-3500 Models)
Pitman parts should be replaced when they are worn. See the pitman assembly illustration in the parts
book. Frequent lubrication and keeping bolts tight will prevent premature failure. ATTENTION: The
connector plate is a safety fuse, which is designed to fail before more serious damage can occur to the
motor shaft and other expensive parts when the knife jams. If the mower continues to break pitman
connectors, look for other causes. DO NOT REPLACE WITH A HEAVIER CONNECTOR! USE ONLY
TRIUMPH CONNECTOR PLATES and pitman parts.
FLYWHEEL:
(2500-3500 Models)
The flywheel is secured to the motor shaft with TWO set screws, one over the top of the other. The inner
set screw locks the flywheel on the shaft. The outer set screw locks the inner set screw. It is important
to check these set screws occasionally. Looseness at this connection can cause vibration, broken
motor shafts and broken pitman parts.
KNUCKLE BOLT:
The knuckle bolt is adjustable to take up knuckle wear (Figure #23 & 24 on next page).
Adjust as follows:
1. Remove the cotterpin from the knuckle bolt.
2. Raise the cutterbar to the transport position.
3. Tighten the knuckle bolt nut to remove any end play between the carriage and knuckle.
4. Back off on the nut just enough to allow the cutterbar to return to the ground by gravity alone.
5. Re-install the cotterpin.
Improper adjustment of this connection can cause excessive vibration and wear if too loose and will
prevent easy lifting and lowering of the cutterbar if too tight.
RETURN SPRING OR KNUCKLE REPLACEMENT:
(2500-8500 Models)
Return spring tension is not adjustable.To replace return spring or knuckle, use Triumph release tool
#0161700 & come-along fastened to the rear wheel of the tractor. (Figure 21 & 22). Proceed as follows:
1. Install the release tool into the release pin.
2. Attach the come-along to the release tool and the tractor rear wheel.
3. Pull back w/ the come-along until the spring tang lifts off the stop block.(Figure 22, Next Page)
4. Remove the stop block and release spring tension with come-along.
5. Remove the 3 capscrews at the top and bottom of the support knuckle.
6. Remove the release pin.
7. Remove the spring support assembly from the cutterbar support.
8. Remove the knuckle bolt & knuckle (only if needs to be replaced). (See Fig. 23 & 24, next page)
9. Reverse the procedure to install new parts.
10. Retension the spring and install the stop block.
Use extreme care when winding or unwinding the return spring. Sudden release of tension can result in
injury to you.
SERVICE INSTRUCTIONS