Troy-Bilt 52067 - 5HP - Manual (Page 14)

12 Section 5: Maintenance
Before inspecting, cleaning or servicing the machine, shut off engine, wait for all moving parts to come to
a 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.
WARNING
6. Thread nut (B, Figure 5-4) a few turns
back onto spindle shaft (E) to protect the
threads on the 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 as-
sembly (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.
11. Using a 9/16" wrench and a 7/32" hex
(Allen) wrench, loosen the mounting nut
(G, Figure 5-6) and screw on the idler
pulley (I) a few turns, or until belt is free
to slip out between pulley and belt guide
(J). Remove belt.
12. Loosen rear belt guide screw (K,
Figure 5-6) enough to allow belt to be re-
moved from engine pulley (L). Remove
belt from unit.
Belt Replacement
1. Install belt on engine pulley (L, Figure
5-6) and retighten rear belt guide screw
(K) securely.
2. Route belt between idler pulley (I,
Figure 5-6) and belt guide (J), to inside of
brake arm (M), and next to die-cast belt
guides (N).
3. Securely tighten the mounting nut (G,
Figure 5-6) and screw in the idler pulley (I).
4. Securely tighten the idler arm mount-
ing screw (S, Figure 5-6). After tighten-
ing, check that idler arm is free to rotate.
If not, remove idler arm and check for de-
bris that may be interfering with freedom
of movement.
5. Look at the spindle head mounting
hole (O, Figure 5-6) and note the grooves
that are cut into the inner sides of the
hole. These grooves were formed by the
splines on the spindle shaft (E, Figure 5-5).
6. Install the belt on the spindle head
pulley (P, Figure 5-5) and insert the spin-
dle shaft (E) (with attached spindle head
assembly) into the spindle head mount-
ing hole (O, Figure 5-6). Rotate the spin-
dle head assembly to align the splines on
the spindle shaft with the grooves in the
mounting hole. Check that the belt is still
in the pulley groove and is to the inside of
the die-cast belt guides (N, Figure 5-6).
7. Using a firm push on the spindle head
assembly (Figure 5-6A), seat the spindle
head assembly into the hole. Check that
the threaded end of the spindle shaft is
protruding through the bottom of the
hole.
8. Reinstall the flat washer (D, Figure 5-
4), belleville washer (C) and nut (B) on
the spindle shaft. Note that the dished-in
side of the belleville washer must face the
flat washer. Tighten the nut securely
(torque to 50 ft./lbs.), while checking fre-
quently to ensure that the spindle head
rotates freely. If the spindle head binds,
it could be due to the belt being pinched
between the spindle head and the belt
guides. If so, remove the spindle head
assembly and repeat steps 5-7.
9. Replace plastic plug (A, Figure 5-4).
Figure 5-5
Figure 5-6
E
F
P
R T K
N
N
O
M
G
I
S
J
L