Piston Pin; Cylinders / Casing Assy; Timing Chain; Head - Husqvarna NUDA 900 R 2012 Workshop Manual

NUDA 900 2012/2013 - NUDA 900 R 2012/2013
Description Part

Piston pin

Ø piston pin PISTON PIN 18/11x50
Connecting rod stem
Connecting rod small end
assy. / PISTON PIN
radial clearance
18/11x50
Piston / piston pin radial
PISTON PIN 18/11x50
clearance

Cylinders / Casing assy.

Ø cylinder bore Casing assy.
Compression pressure
Permitted deformation of
Casing assy.
the sealing surface

Timing chain

Lengthening of the tim- T I M I N G
ing chain 6.35X10.9X146
Depth of the traces of
Chain tensioner pad /
wear in the chain ten-
Chain guide / Upper chain
sioner slider and in the
guide
chain guide

Head

Diameter of chain ten-
Cylinder head assy.
sioner holes
Permitted deformation of
Cylinder head assy.
the sealing surface
Intake cam height Intake camshaft
Exhaust cam height Exhaust camshaft
Bearing bore for both
Cylinder head assy.
camshafts
Camshafts - Bearing Intake camshaft / Exhaust
points camshaft
Camshaft radial clear- Cylinder head assy. / In-
ance in cylinder head take - Exhaust camshaft
Axial thrust surface of Intake camshaft / Exhaust
camshafts camshaft
Axial thrust surface of Camshaft bearing cap /
camshaft bearing cap Cylinder head assy.
Camshaft axial clear- Cylinder head assy. / In-
ance take - exhaust camshaft
Rocker arm - shaft seat Rocker arm
Rocker arm - shaft seat Rocker arm shaft
Valve spring - Spring
Valve spring
relieving length (Lo)
WEAR LIMITS OF ENGINE PARTS
ENGINE WEAR VALUE TABLE
Measurement
point
Measured in the direction
of travel.
Measured in the direction
of travel.
Ø cylinder measured 31
- 36 mm from the upper
edge, in 2 points (in the
direction of travel and
transversely to the direc-
tion of travel).
Measurement with valve
clearance correctly ad-
justed.
On the entire surface.
C H A I N
On the entire surface.
6 bearing points
every 3 bearing points
6 bearing points
Cam gear side
Camshaft bearing cap -
Cam gear side
New value [mm] Wear limit [mm]
min. Ø 17.98 mm
Detachments in the DLC
Ø 18 +0.002/-0.005 mm
coating are not permit-
ted.
0.008 - 0.025 mm max. 0.04 mm
0.008 - 0.025 max. 0.04 mm
Ø 84 +/-0.007 max. Ø 84.03 mm
17 bar 13 bar
max. 0.05 mm max. 0.05 mm
- -
0 mm max. 0.8 mm
Ø 14 +0.006/+0.024 max. Ø 14.05 mm
max. 0.03 mm max. 0.04 mm
39.97 +/-0.1 mm min. 39.85 mm
39.97 +/-0.1 mm min. 39.85 mm
Ø 25 +0.02/+0.041 max. Ø 25.06 mm
Ø 25 0 -0.013 mm min. Ø 24.97 mm
0.02 - 0.054 mm max. 0.08 mm
21 0/+0.05 mm max. 21.08 mm
20.93 0/-0.05 mm min. 20.75 mm
0.07 - 0.17 mm max. 0.3 mm
Ø 12 +0.016/+0.034 max. Ø 12.05 mm
Ø 12 -0.016/-0.027 min. Ø 11.96 mm
48.8 mm min. 47.5 mm
F5.7
Remarks
Measurable only with a
special tool.
Workshop Manual Ed. 11-2011