Compression
CAUTION
Contents
INJURY MAY occur if the crankshaft is not
positively locked from rotating, and the engine is
not securely fastened to a stand or the mower. The
air pressure can create a rotational force of up to
60 ft. lbs. (81.0Nm) if the crankshaft is not locked
with the piston at top dead center.
Test Compression . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Remove Cylinder Head . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Prepare Cylinder Head for Removal . . . . . . . . . . . . . .
Remove Rocker Cover . . . . . . . . . . . . . . . . . . . . . . . .
Remove Cylinder Head . . . . . . . . . . . . . . . . . . . . . . . .
Remove Valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inspect Valve Guides . . . . . . . . . . . . . . . . . . . . . . . . . .
Valve Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Reface Valves and Seats . . . . . . . . . . . . . . . . . . . . . . .
Assemble Cylinder Head . . . . . . . . . . . . . . . . . . . . . . . . . . .
27
28
28
28
28
29
29
29
29
29
1
2
3
Install Cylinder Head Plate and
Rocker Arm Studs . . . . . . . . . . . . . . . . . . . . . . . . . .
29
30
30
30
30
31
31
31
32
32
Install Valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Install Valve Springs and Retainers . . . . . . . . . . . . . . .
Install Cylinder Head . . . . . . . . . . . . . . . . . . . . . . . . .
Install Rocker Arms—Current Style . . . . . . . . . . . . . .
Install Rocker Arms—Early Style . . . . . . . . . . . . . . .
Adjust Valve Clearance—Current Style . . . . . . . . . . .
Adjust Valve Clearance—Early Style . . . . . . . . . . . . .
Install Valve Cover . . . . . . . . . . . . . . . . . . . . . . . . . . .
Specification Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fig. 47 – Installing Clamping Tool
1.
2.
1” diameter crankshafts;
remove spacers
3. 1/2” square hole
Torque to 150 in. lbs.
(17.0Nm)
Test Compression
1.
Start and run engine for approximately 5 minutes to allow
engine to reach operating temperature.
1
CAUTION
2
BEFORE PERFORMING following test, connect
spark plug wire to engine ground.
Fig. 48 – Pre-Setting Regulator
1.
Regulator lock nut and
adjustment knob
2. Turn counterclockwise
Note: If engine is cold or cannot be started, air flow may
be higher and gauge readings lower because compression
components are not at normal operating temperatures.
7.
8.
Connect tester to the shop air source (minimum air
pressure of 70 psi. (49.2KPA).
2.
Remove spark plug from engine. Then remove air cleaner
and disconnect crankcase breather tube from air cleaner
base (if equipped).
Install outlet hose into spark plug hole of cylinder being
tested. Be sure O-Ring is seated to prevent air leak at spark
plug hole. Connect other end to tester.
3.
4.
5.
6.
Rotate crankshaft in direction of operation until piston is at
top dead center of compression stroke.
9.
With breaker bar held securely, slowly turn regulator
adjustment knob clockwise until tester’s inlet gauge needle
is on the set point. Push in regulator lock nut. Note
position of outlet gauge needle, Fig. 49.
Assemble Briggs & Stratton Tool #19314, Clamping Tool,
on crankshaft. Torque screws to 150 in. lbs. (17.0Nm).
Insert drive end of a 1/2” drive breaker bar into square
hole in clamp, Fig. 47.
Pull regulator lock nut out and turn adjustment knob
counterclockwise as far as it will go, Fig. 48.
Note: The crankshaft must be held with the piston at top
dead center to eliminate any chance of rotation.
GTS 200
27
Compression
| Categories | Lawn Mower Manual, Parts and Accessories Manuals, Toro Lawn Mower Manual |
|---|---|
| Tags | Toro GTS 200 |
| Download File |
|
| Language | English |
| Product Brand | Toro. Customer Service Representatives are available by phone:
Monday - Friday 7:30 a.m. to 9:00 p.m. (CDT) - Saturday 8:00 a.m. to 8:00 p.m. (CDT) - Sunday 10:00 a.m. to 8:00 p.m. (CDT)
Canada 1-888-225-4886 USA 1-888-384-9939, Lawn Mower |
| Document File Type | |
| Publisher | toro.com |
| Wikipedia's Page | Toro Company |
| Copyright | Attribution Non-commercial |
(0 votes, average: 0 out of 5)