Technical Information · issue 47 of 1999
Tank vent
IssueTI 47/1999
Full text
Page 1 of 3
Technical Information
47.1999
STIHL cut-off machines TS 460 - model 4221
Contents
1. Tank vent (expansion tank, manifold)
2. Carburetor HS 275 (valve jet)
1. Tank vent (expansion tank, manifold)
Machines from machine number 1 44 493 245 Supply of spare parts / service notes
onwards contain a modified tank vent for improved Tank vent and expansion tank remain available in
functioning. As before, the fuel tank is ventilated via the former versions. The manifold is only available
the separate expansion tank in the engine housing. from factory in the new version. The new tank vent
A hose leads from the new tank vent to a connector is only available as a complete assembly when
on the manifold, permitting pressure equalization ordered as a spare part.
on the clean-air side of the intake section.
The connector remains sealed by a rivet when the
The advantage of the new tank vent is that it forms
new manifold is installed in older machines.
a "closed system": dirty ambient air cannot enter
Hose 4205 141 8601 must be inserted into the
into the fuel system in situations with negative
expansion tank so that a length of approx.
pressure.
190 mm (7.5 in) protrudes from the tank.
337TI000 KN
337TI014 KN
Hose routing for former tank vent Hose routing for new tank vent
TI_47_1999_30_02.fm english / USA Page 2 of 3
Page 2 Technical Information 47.1999
5
4 10
3
7 2 9
1 1
8 15
6
17
11 14
17
13 16 12
337TI015 KN
Former New
Summary
Item Part name Former part No. New part No. Rem.
1 Tank vent; complete incl. Items 2 to 7: 4221 350 5801 4223 350 5803 1)
2 Filter 0000 358 1812 -*- 1)2)
3 Valve 4114 353 1600 -*- 1)2)
4 Filter 0000 358 1810 -*- 1)2)
5 Cap 4223 353 2300 -*- 1)2)
6 Hose 102 mm (4 in.) 1129 141 8600 --- 1)
7 Hose 138 mm (5.4 in) 1110 141 8600 --- 1)
8 Grommet 4221 353 9200 --- 1)
9 Hose 110 mm (4.3 in) --- 4130 358 7600
10 Connector --- 4226 122 3900
11 Pick-up body 0000 350 3502 --- 1)
12 Expansion tank; incl. Items 13 to 16: --- 4221 350 0600
13 Expansion tank 4221 351 1500 -*- 1)2)
14 Grommet --- 0000 989 0516
15 Grommet --- 4223 353 9201
16 Hose 325 mm (12.8 in) --- 4205 141 8601
17 Manifold 4221 141 2201 4221 140 2501 3)
Modification to be introduced as from machine No. 1 44 493 245
Remarks
1) Former version of part remains available
2) New version of part is not available individually as spare part
3) Only new version of part supplied from factory
TI_47_1999_30_02.fm Page 3 of 3
Technical Information 47.1999 Page 3
2. Carburetor HS 275 (valve jet)
From machine No. 1 42 694 630 onwards, a
modified version of carburetor 4221 120 0651 is
used to further optimize emission levels.
The former valve jet 4221 121 5602 (0.86) is
replaced by the version 4221 121 5603 (0.84).
The carburetor type designation is consequently
changed from HS 275 A to HS 275 B.
Summary
Item Part name Former part No. New part No. Rem.
Carburetor HS 275 A; 4221 120 0651 --- 1)
Carburetor HS 275 B; --- 4221 120 0651
with the respective
Valve jet 0.86 4221 121 5602 --- 2)
Valve jet 0.84 --- 4221 121 5603
Modification to be introduced as from machine No. 1 42 694 630
Remarks
1) Only modified version of part is supplied from factory
2) Former version of part is no longer available from factory
Last Technical Information on STIHL TS 460: 06.98
© 1999 Andreas STIHL AG & Co. Technical Documentation
Waiblingen D1/MTK-sc 6795
TI_47_1999_30_02.fm Extracted from the manufacturer's 2012 service catalogue. Most of these PDFs embed fonts with a shifted character map, so the text above was recovered rather than copied — read it as a faithful but imperfect transcription, and treat the page image above each block as the authority where the two disagree — the figures exist only there, because they are vector drawings that text extraction cannot keep.