REAR DRIVE CHAINS
CHAIN TENSIONING
Do a thorough washing and cleaning of the #1805
Chains and mating Sprockets with a powerwasher
or a stiff brush. The Sprockets must be clean and
the mating Drive Chains must be clean & lubri-
cated to give proper chain adjustment.
Note: This
may be helpful to do outside, and not in your
garage or shop.
Begin your Drive Chain Tensioning procedure by
driving Crawler onto a firm, level surface. Shut off
Engine and dismount...do not “engage” Parking
Brake Lever. From below, support body of Crawler
so the Tracks clear the ground by approximately
2” and are free to rotate...make sure the Brake is
disengaged at this time.
Use solid blocking, place it under the Crawler’s
Body per
“Safe Blocking Diagram”
in front sec-
tion of this Manual. It will give the Crawler the
greatest support left to right and front to rear.
Lubrication:
At a minimum...brush on
SAE 30
weight oil (non-detergent)
on rear drive chains.
A more expensive, but cleaner option is to use a
spray lubricant, such as:
non detergent aerosol
Chain & Wire Rope Lubricant. We use CRC®
brand, Grainger® Item #2F139.
Both of these
methods are acceptable lubrication options.
NOTE: Your front idler, rear drive sprockets, &
sprocket hubs may look different from the
ones shown in the next few pages, but the rear
drive chain tensioning procedure will be the
same.
For clarity purposes, the pictures show
the tracks removed. It is NOT necessary to re-
move the tracks to tighten the rear drive
chains, but you MUST loosen them.
Understanding the Task:
The #1805 Rear Drive
Chains (#50H Roller Chain) are tightened by in-
creasing the center distance between the
mov-
able #2065 Rear Axle
and the
fixed #4510
Sprocket Hub. We advise for the tracks to be
loose to properly adjust the rear drive chain.
Please see the picture at the top of the next
column.
Open Hood and swing fully forward; remove
#1688 Seat Pin. Remove Seat & Bracket, Arm
Rests and Rear Cover.
Step 1:
From “outside” the Crawler’s body, loosen
(but do not remove) the five nuts on each Front
Axle Plate. Do the same for both sides of the trac-
tor. See below.
Step 2:
Loosen the 2 bolts that connect the “cen-
ter idler frame” to the “track expander.” Do the
same to both sides of the tractor. (If installed on
your machine.) See below.
Step 3:
From “inside” the Crawler’s body, loosen
(but do not remove) the 4 nuts on each “Inner
Rear Axle Plate”. Do the same for both sides of
the tractor. See the 2 pictures at the top left of the
next page.
45
#4510
#2065
#1805
Front Axle
Plate
5 Nuts
Front Idler
Front of Machine
Track
Expander
2 Bolts
Center Idler Frame