Technical Information · issue 47 of 1996
New telescopic pruner
IssueTI 47/1996
Full text
Page 1 of 4
Technical Information
47.96
Pole pruner STIHL HT 75 - type 4138
The new pole pruner STIHL HT 75 makes an ideal
tool for cutting and maintaining tree limbs.
The telescoping shaft allows the HT 75 to be
easily adjusted for length. The hook molded onto
the gearbox serves as a stop when sawing.
The machine is equipped with a powerful engine
(0.9 kW/1.2 HP) and weighs 14.6 lbs. fo
The power unit in the HT 75 is the same as that of
the brushcutters STIHL FS 75, 80 and 85. Other
assemblies (such as the control handle) are also
the same as in these brushcutter models.
The STIHL pole pruner is fitted with a
Picco-Mini bar and chain (as for the STIHL 017
chainsaw) with a bar length of 14 in.
)Technical Information 47.96 - Page 2
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1. Technical description
2. Technical specifications
3. Bar and chain
4. Special accessories for the user
5. Servicing accessories
6. Repairs
1.======Technical description
The engine is identical to that of the STIHL FS 75, 80, 85.
The cutting attachment is the same as that of the chainsaw 017 - any differences are specified.
Telescoping shaft
• Telescoping tube with profiled shaft (pre-lubricated) running in the supportive tubing and ball bearings.
Gearbox / fastening for bar and chain
• Spiral-toothed 90° pinion gear, with a mount for the cutting attachment.
Oil pump
• Same mechanical design as on STIHL 021, 023, 025. fo
2.======Technical specifications
The technical specifications are the same as those for the brushcutters FS 75, 80, 85.
Any discrepancies are specified.
2.1=====Engine
Type Lp Lp (50 ft.)
(operators ANSI B175.3
ear)
ANSI B175.3
HT 75 101 69
2.2=====Dimensions / weight
2.2.1=Overall length
Shaft fully retracted - without cutting attachments: approx. 7.7 ft.
- with cutting attachments: approx. 8.7 ft.
Shaft fully extended - with cutting attachments: approx. 12.5 ft.
2.2.2=Weight
HT 75: 14.6 lbs.
)Technical Information 47.96 - Page 3
3.====Cutting attachments
Bar length 14 in; Oilomatic chain 3/8", Picco-Micro-Narrow (PMN), 44 links;
Rollomatic Mini guide bar; spur chain sprocket, 7 teeth, for 3/8" P
4.====Special accessories for the user
Part name Part number Use, remarks
File holder 5605 750 4327 Sharpening the chain
including:
- Round file, 0811 411 8073 5/32" diameter
Filing gauge 0000 893 4000
5.====Servicing accessories
5.1===Special tools
The same special tools are required as for the brushcutters FS 75, 80 and 85.
5.2===Aids
Part name Part number Use Remarks
Set of carburetor parts 4226 007 1060 Zama C1Q-S28A carburetor new
Grease (40 g tube) 0781 120 6602 Drive shaft (profiled shaft), gear new
6.====Repairs
The specific national safety regulations and the safety instructions in the User Manual
must be noted when the machine is put into operation.
Settings, test values and other notes are identical with those for the brushcutters FS 75, 80, 85.
Any differences are specified.
6.1===Tightening torques
Connecting Tightening torque
element Thread size For part (Nm) (ft. lbs.)Rem.
Socket-head screw lS-DG5x12 Oil tank / gear housing 2.5 1.8
Socket-head screw IS-M5x20 Clamp / large protective tube 3.0 2.2
Socket-head screw IS-M5x20 Clamp / small protective tube 3.0 2.2
Socket-head screw IS-M6x14 Clamping collar / carrying ring 4.5 3.3
Socket-head screw IS-M6x20 Clamp / power unit / shaft 4.5 3.3
Set screw M8 Bar fixture 1)
5HPDUNV
1) Use a medium-grade adhesive (e.g. Loctite 243) to secure and screw down to 19.5 Nm. (14.4 ft. lbs.).
)Technical Information 47.96 - Page 4
6.2===Service notes
The STIHL HT 75 must be serviced and repaired
in accordance with the Repair Manual STIHL
FS 75, 80, 85, FC 75. Any service notes not
included there (telescoping shaft, gear) can be
found in TI 03.97.
The Repair Manual does not include a chapter on
"Repairing the carburetor" and "Troubleshooting",
nor does it contain standard repairs. These are
dealt with in special manuals.
Andreas Stihl D1/MTK-na
© 1996 Andreas Stihl Technical Documentation 5920 Page 2 of 4
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