Troy-Bilt 1900678 - Manual (Page 8)

STEP 2: Attach Handlebars
A. Parts Needed: (3) 3/8"-16x3/4" long Hex Hd.
Screws, (3) 3/8" Lockwashers, (3) 3/8"-16 Hex Nuts,
(1) Plastic Tie (for 22" Mower Only).
B. Gently fold back the handlebars from their shipping
position atop the mower and align the holes in the
ends of the left and right handlebars with the holes in
the mower frame handlebar mounting brackets. See
Photo 2-3. Note that the ends of the handlebars can be
positioned to either the inside or the outside of the
mounting brackets (make certain that both ends are
positioned the same way: either both inside or both
outside).
Photo 2-3: Attach left and right handlebars.
C. Install two 3/4" long screws through the mounting
holes with the screw heads facing outside. Add 3/8"
lockwashers and hex nuts and tighten both screws
finger-tight.
D. There are two height adjustment holes at the bottom
of the center handlebar brace and two adjustment
holes in the height adjustment bracket which is welded
to the mower frame. See Photo 2-4. The four holes
allow you to choose three different handlebar height
positions: LOW, MEDIUM and HIGH.
Photo 2-4: Handlebar height adjustment holes. (Bell-
crank plate on self-propelled model has been rotated
upward for photo clarity.)
E. Select a hole combination according to the chart
below, then temporarily insert a 3/4" long screw through
the brace and bracket from right to left. Check that the
handlebars are set at a comfortable operating height
and readjust the setting if necessary. When you are
satisfied with the height setting, add a 3/8" lockwasher
and 3/8" hex nut and tighten securely using two 9/16"
wrenches.
USE HOLES TO OBTAIN:
1-4 LOWEST HANDLEBAR HEIGHT
1-3 & 2-4 MEDIUM HANDLEBAR HEIGHT
2-3 HIGHEST HANDLEBAR HEIGHT
F. Securely tighten the two upper handlebar mounting
screws that you finger-tightened in Step C.
G. On the 22" mower (5HP engine) only, use a plastic
tie to secure the blade drive control cable (the thick
black cable attached to the blade drive control on the
left handlebar) to the center handlebar brace. Locate
the tie 3" to 4" above the bend at the lower end of the
center brace.
NOTE: For future handlebar height adjustments, refer
to the instructions found in Section 5.
STEP 3: Attach Wheel Drive Control Rod
(Self-Propelled Models Only)
A. Parts Needed: (1) Clevis Pin, (1) Spring Clip.
B. One end of the upper wheel drive control rod is
already attached to the wheel drive lever located on
the right side of the handlebars. See Photo 2-5. The
clevis at the bottom of the control rod must be attached
to the bellcrank located at the rear of the mower. See
Photo 2-6.
C. There are three positioning holes in the bellcrank
that are identified in Photo 2-6 with the letters “H”, “M”
and “L”. As shown in the chart below, the clevis must
be installed in the correct bellcrank hole, relative to the
height setting of the handlebars.
USE HOLE IF HANDLEBARS ARE IN:
“H” HIGHEST HEIGHT SETTING
“M” MEDIUM HANDLEBAR SETTING
iilJl
LOWEST HANDLEBAR SETTING
ff -«-WHEEL DRIVE LEVER
'i.'
WHEEL DRIVE
CONTROL ROD
1
Photo 2-5: Wheel drive lever and upper control rod.