Adjustments; Belt Adjustment; Carburetor Adjustment - Toro Workman 3000 Series Service Manual

Adjustments

Belt Adjustment

1. Park machine on a level surface, stop engine and en-
gage parking brake.
2. Check tension by depressing belt at mid span of
crankshaft and pump pulleys with 22 lbs. (10 Kg) of
force. A new belt should deflect .48 – .58 in. (12 – 15
mm). A used belt should deflect .55 –.65 in. (14 – 17 mm)
If deflection is out of specification, go to next step. If
deflection is within specification, no adjustment is nec-
essary.
3. To adjust belt tension:
A. Loosen nuts securing hydraulic pump to engine
frames.
B. Rotate pump to obtain correct belt tension, then
tighten nuts.

Carburetor Adjustment

IMPORTANT: Before doing carburetor adjustment,
make sure:
– Engine has warmed up.
– Choke is operating correctly.
– Fuel tank is full.
– Fuel tank cap vent is not blocked.
– Fuel filter is clean.
– Air cleaner element is clean.
– All components are fastened securely.
1. Park machine on a level surface, stop engine and en-
gage parking brake.
2. Low Idle Adjusting Needle – Close adjusting needle
by gently rotating in clockwise.
3. Rotate (open) adjusting needle 1–
clockwise.
Engine must be running so final adjustment
of carburetor can be performed. To guard
against possible personal injury, keep hands,
feet, face and other parts of the body away
from muffler, engine and other moving or ro-
tating parts.
Air Cooled Gas Engine (Rev. G)
5
/ turns counter-
8
WARNING
1
4. Start engine and let it run for 5 to 10 minutes. Engine
must be warm before making final adjustments. Check
to make sure throttle and choke plates open fully.
5. With engine idling, turn low idle speed adjusting
screw in or out to obtain a low idle speed of 1200 + 100
RPM. Check speed with a tachometer.
6. Turn low idle adjusting needle in SLOWLY until en-
gine speed decreases and then back it out approximate-
3
ly / to 1 turn to get the best low speed performance.
4
7. Check idle speed again using a tachometer and re–
adjust if necessary.
Page 5 – 4
Figure 3
1. Pump belt
Figure 4
1. Low idle adjusting needle
2. Low idle speed adjusting screw
Workman 3100