Service manual

2-2 Inspection
(1) Running clearance between outer rotor and inner
rotor
Using a thickness gauge, check the clearance at
various positions.
If the reading exceeds the service
limit; replace
both rotors..
Specifications
Unit: mm (in.)
Item
Standard
Service
limit
Clearance between
0.013-0.15 0.25
inner rotor and
(0.00051- 0.0059)
(0.0098)
outer rotor
(2)
Sliding clearance between rotors and cover
This clearance
is required to be not greater than
0.15 mm (0.00591 in.). If this limit is exceeded,
grind
off the mating face of the body to reduce
the clearance.
Specifications
Unit:
mm (in.)
Item
Standard
Repair
limit
Clearance between
OJ)4.-0.09
0.15
rotors and cover
(0.0016 -0.0035)
(0.0059)
(3) Radial clearance between outer rotor and pump
body
Insert a thickness gauge into between outer rotol
and body, If the clearance checked is greater than
the limit, replace the worn part.
Specifications
Unit: mm
(iR.)
Item
Standard
Repair
limit
Clearance of outer
0.2-0.275
0.50
rotor in body
(0.0079 - 0.0 1 083
(0.020)
(4) Rotor shaft diameter
Inspect the shaft for damage, and check it
for
wear by miking. Determine the available clearance
of the shaft in the pump body from the mike
readings; if the service limit in terms
of clearance
value
is exceeded or if the shaft is in badly dam-
aged condition, replacement is necessary.
Specifications
Unit:
mm (in.)
Item Standard
Service
limit
Rotor
0
13 -D.015
shaft
(0.5118 J.00059 )
diameter
Shaft to
0.032 - 0.074
0.15
body
clearance
(0.00126 - 0.00291) (0.0059)
- 50-
Checking rotof-to-rotor clearance
Checking rotor-to-cover clearance
Checking rotor-to-body clearance