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Generac Power Systems GTV-990 User Manual
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SER
VICE
MANU
AL
Manual P
art No. 0E2081
P
r
inted in
U
.
S
.A
P
.O
.
Bo
x 297 •
White
water
,
WI • 53190
Phone:
(262) 473-5514
F
ax:
(262) 472-6505
GTV – 990/760
V
-TWIN
OHVI ENGINE
Draft Approved- 04/24/03
2
Table of Contents
Table of Contents
3
Rules for Safe Operation
4
Service Information
5
Dimensions and Features
6
4-Cycle Engine Theory
10
Maintenance Schedule/Fuel and Oil Recommendations
11
Fuel and Oil Recommendations
11
Gasoline
11
Lubrication
11
Recommended Oil Type
11
Change Oil
12
Change Oil Filter
12
Cleaning Intake Screen
12
Replace Spark Plugs
13
Air Cleaner Maintenance
13
Service Dual Element Air Cleaners
13
Service Canister Air Cleaners
13
Maintenance Schedule
11
Troubleshooting
13
Systematic Check
14
Check Ignition
14
Check Ignition (Engine Running)
14
Check Ignition (Fouled Plug or Other Causes)
14
Cylinder Balance Test
14
Check Fuel
15
Check Compression
15
Cylinder Leakdown Test
15
Things Which Affect both Cylinders
15
Things Which Affect One Cylinder
15
Equipment Affecting Engine Operation
16
Hard Starting or will Not Start
16
Engine Won't Stop
16
Vibration
16
Power Loss
16
Noise
16
Section 1: General Information
17
Section 2: Ignition
17
Section 3: Carburetion
21
Section 4: Governor Controls and Governor
25
Section 5: Cylinder Head and Valves
29
Disassemble Cylinder Head
30
Inspect and Repair
31
Reface Valves and Seats
31
Assemble Cylinder Head
32
Adjust Valve Clearance
33
Install Cylinder Head
33
Reassemble
33
Static Governor Adjustment
34
Section 6: Electric Starter
35
Section 7: Alternators
41
Section 8: Lubrication System
43
Section 9: Engine Disassembly
47
Section 10: Cylinder and Crankcase Cover
49
Bearings
50
Check Mag Bearing
50
Cleaning
50
Remove Mag Bearing
50
Check PTO Bearing
51
Install Mag Bearing
51
Remove/Install PTO Bearing
51
Check Camshaft Bearings
52
Install PTO Oil Seal
52
Oil Seals
52
Section 11: Crankshaft and Camshaft
55
Section 13: Engine Assembly
61
Section 14: Specifications
67
4
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Generac Power Systems GTV-990 Specifications
General
Brand
Generac Power Systems
Model
GTV-990
Category
Engine
Language
English
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