Technical Information · issue 35 of 1998
New Pole Pruner HT 70
IssueTI 35/1998
Full text
Page 1 of 4
Technical Information==============================================35.98
New HT 70 Pole Pruner - Series 4138
The new HT 70 lightweight pole pruner features a
rigid shaft and is the latest addition to this new
product group.
The unit comes equipped with a 0.9kW/1.2bhp
engine and weighs only 4.9kg (10.8lb).
Apart from the rigid shaft, the HT 70 is otherwise
the same as the HT 75.
Applications are identical to those of the HT 75.
The shorter, rigid shaft makes the HT 70 particu-
larly suitable for cutting at lower heights.
)35.98 - 2
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1. Technical description
2. Specifications
3. Cutting attachment
4. Special accessories for user
5. Service accessories
6. Repairs
1.=Technical description
Apart from the shaft, the components and assemblies are exactly the same as those in model HT 75.
6KDIW
• Drive tube with rigid shaft running in a protective liner.
2.=Specifications
Specifications are the same as those of the HT 75, differences are listed below.
Dimensions / weight
2.1=Overall length
- without cutting attachment: approx. 180cm (70.86")
- with cutting attachment: approx. 210cm (82.7")
2.2=Weight
HT 70: 4.9kg (10.8lb)
3.=Cutting attachment
Cutting length 12"; 3/8" Oilomatic chain, Picco-Micro-Mini (PMN), 44 drive links;
Rollomatic Mini guide bar; 7-tooth 3/8" P spur sprocket
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4.=Special accessories for user
Part Name Part No. Application, remarks
File holder 5605 750 4327 Sharpening chain
including
- Round file, Ø 4mm (5/32")
Filing gauge 0000 893 4000
5.=Service accessories
5.1=Special servicing tools
The same special servicing tools are used as for model FS 85 brushcutters.
5.2=Servicing aids
Part Name Part No. Application Rem.
Carburetor parts kit 4227 007 1060 Zama C1Q-S28C, C1Q-S41
Lube grease
(225g/8oz tube) 0781 120 1111
Oil seals
Lube grease
(40g/1.4oz tube) 0781 120 6602 Gear box
Lube grease
(80g/2.8oz tube) 0781 120 1109 Drive shaft
6.=Repairs
If the unit is started up in the course of repairs or maintenance work it is essential to observe all
local safety regulations and the safety precautions outlined in the owner¶s manual.
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6.1=Service note=========================================oepair times are in tenths of an hour (0.1 = 6 minutes)
Setting and testing data as well as other informa- Code Type of Repair HT 70
tion are exactly the same as for model HT 75 and
FS 85 brushcutters (shaft).
Refer to the FS 75, 80, 85, FC 75, HL 75 service 1 Crankcase 2.1
manual for servicing and repair procedures on the
HT 70. Procedures not contained in that service 2 Crankshaft and/or bearings 2.2
manual (gearhead) are outlined in TI 03.97. 3 Crankcase gasket, sealing 2.0
The service manual does not include the chapters
"Servicing the Carburetor", "Troubleshooting" or 4 Crankshaft seals 0.7
any repairs involving standard procedures. Such
repairs can be found in the separate "Carburetor" 5 Cylinder and/or piston 0.8
and "Standard Repairs, Troubleshooting"
handbooks. 6 Ignition 0.5
7 Fuel hose, fuel supply 0.5
6.2=Repair times============================================U====oeplace gear box assy 0.5
The specified repair times assume that the work 9 Carburetor 0.7
is performed by trained personnel in a properly
equipped service workshop. 10 Fan housing, clutch housing 0.8
The repair times are given in tenths of an hour
11
Front handle, throttle 0.6
(0.1 = 6 minutes). 12 Recoil starter 0.5
Note:=qhis table for the HT 70 can be used to 13 Clutch 0.5
update the STIHL repair times table.
14 Replace drive tube, shaft, bearings 0.5
15 Muffler 0.4
16 Air filter, filter cover 0.3
7.=Spare parts
17 Stop switch 0.4
Parts for the HT 70 will be incorporated
in the existing HT 75 parts list. 18 Fuel tank 0.4
The parts list for the HT 70 is included in 19 Replace drive gears 0.7
the 3.98 issue of the microfiche and CD-ROM.
20 All other repairs & misc. repairs 0.5
© 1998 Andreas Stihl AG & Co. Technical Documentation
Waiblingen D1/MTK-na 6367 Page 2 of 4
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