Yamaha EF7000 Service Manual page 4

HOW TO USE THIS MANUAL
This manual is intended as a handy, easy-to-read reference book for the mechanic.
Comprehensive explanations of all installation, removal, disassembly, assembly, repair and check
procedures are laid out with the individual steps in sequential order.
9 The manual is divided into chapters and each chapter is divided into sections. The current sec-
tion title is shown at the top of each page 1.
9 Sub-section titles appear in smaller print than the section title 2.
9 To help identify parts and clarify procedure steps, there are exploded diagrams at the start of
each removal and disassembly section 3.
9 Numbers are given in the order of the jobs in the exploded diagram. A number indicates a dis-
assembly step 4.
9 Symbols indicate parts to be lubricated or replaced 5.
Refer to "ILLUSTRATED SYMBOLS".
9 A job instruction chart accompanies the exploded diagram, providing the order of jobs, names of
parts, notes in jobs, etc. 6. This step explains removal procedure only. For installation, reverse
the steps.
9 Jobs requiring more information (such as special tools and technical data) are described
sequentially 7.
1
PISTON, CAMSHAFT, CRANKCASE, AND
PISTON, CAMSHAFT AND CRANKSHAFT
3
20 Nm (2.0 m á kgf, 14 ft á lbf)
4
4
5
5
6
Order Job/Parts to remove
Removing the piston, camshaft and
crankshaft
Crankcase
1 Balancer shaft
2 Camshaft
3 Valve lifter
4 Connecting rod cap
5 Crankshaft
6 Connecting rod
7 Piston pin circlip
8 Piston pin
9 Piston
10 Piston ring set
ENG
CRANKSHAFT
10
7
8
9
7
6
3
2
1
Q'ty Remarks
Remove the parts in the order listed.
Refer to "CRANKCASE" on 3-18.
1
1
2
1
1
1
2
1
1
1
3-20
PISTON, CAMSHAFT, CRANKCASE, AND
d
a
b
1 2
3
ENG
CRANKSHAFT
REMOVING THE BALANCER SHAFT,
CAMSHAFT, AND VALVE LIFTER
c
1. Remove:
9 Balancer shaft 1
TIP
Remove the balancer shaft 1 when the bal-
ancer shaft gear mark a and the crankshaft
gear mark b are aligned.
2. Remove:
9 Camshaft 2
TIP
Remove the camshaft 2 when the camshaft
gear mark c and the crankshaft gear mark d
are aligned.
3. Remove:
9 Intake valve lifter
9 Exhaust valve lifter
CHECKING THE BALANCER SHAFT
1. Check:
9 Balancer gear teeth
9 Balancer shaft
Wear/damage → Replace.
3-21
7
2