Removing And Replacing The Trimmer Head; Inspecting/Replacing The Drive Belt - Troy-Bilt 52057 Owner's Manual

Section 5: Maintenance
WARNING
Before inspecting, cleaning or servicing the machine, shut off engine, wait for all moving parts to
come to a complete stop, disconnect spark plug wire and move wire away from spark plug.
Remove ignition key on electric start models.
Failure to follow these instructions can result in serious personal injury or property damage.
REMOVING AND REPLACING
THE TRIMMER HEAD
1. Stop the engine and wait for all
moving parts to stop. Disconnect
spark plug wire and move it away from
the spark plug. Remove the ignition
key on electric start models.
2. Two bolts (A, Figure 5-3) secure the
trimmer head (B) to the spindle head
(C). Loosen both bolts (not the nuts)
just enough to open up the trimmer
head and allow it to slide down the
spindle head and past the two stops.
Do not attempt to remove the bolts
completely – they are permanently
attached.
3. Install the new trimmer head on the
spindle head. Tighten the hardware
securely (to 75 in/lbs.) and evenly.
4. If the wear cup (D, Figure 5-3) is
worn, replace it. Use a 1/2" socket
wrench to remove the screw (E, Figure
5-3) and washer (F). Install the new
wear cup and reinstall the washer and
screw. Tighten the screw securely.
C
B
D
F
E
Figure 5-3
INSPECTING / REPLACING
THE DRIVE BELT
The drive belt can be inspected or re-
placed from beneath the machine deck.
The belt should not require inspection
for many hours of operation. If re-
placement becomes necessary, follow
the instructions given here.
Belt Inspection
Stop the engine and let all moving parts
stop. Allow the engine to cool.
Disconnect the spark plug wire and
move it away from the spark plug.
Remove the ignition key on electric
start models.
1. For convenience, we recommend
that you place the unit on a raised plat-
form to make access to the underside
of the deck as easy as possible.
2. Examine the belt. Feed it around
the rear (engine) pulley so the entire
belt can be examined. If cracks or
other damage are noted, a new belt is
needed.
Belt Removal
1. Stop the engine and wait for engine
to cool. Disconnect the spark plug wire
and move it away from the spark plug.
Remove the ignition key on electric
start models.
2. Remove gasoline from fuel tank.
DANGER
A
GASOLINE IS HIGHLY FLAMMABLE
AND ITS VAPORS ARE EXPLOSIVE.
• Drain fuel into approved container
outdoors, away from open flame.
• Be sure engine and muffler are cool
before draining gasoline.
• Do not smoke.
Failure to comply can result in seri-
ous personal injury and property
damage.
3. Carefully tip unit on its left side and
secure it in place.
4. Remove the plastic plug (A, Figure
5-4) from the top of the mower deck.
5. Using a 3/4" socket wrench, remove
nut (B, Figure 5-4), belleville washer
(C) and flat washer (D) from spindle
shaft (E).
Figure 5-4
6. Thread nut (B, Figure 5-4) a few
turns back onto spindle shaft (E) to
protect threads on spindle shaft during
the next step.
7. Loosen the spindle shaft by placing
a wood block against the top of the nut
(B, Figure 5-4) and firmly striking the
wood block with a hammer.
8. Remove the nut from the spindle
shaft and then remove the spindle shaft
(E, Figure 5-5) and entire spindle head
assembly (F) from the bottom of the
deck. Slip the belt off the spindle head
pulley (P).
9. Disconnect the idler arm spring (R,
Figure 5-6) from the hole in the idler
arm (T).
10. Using a 1/2" wrench, loosen the
idler arm mounting screw (S, Figure 5-
6) two full turns.
12
A
B
C
D
E