Table of Contents
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1 Introduction
1.1 General
You decided to buy a Schaeff backhoe excavator HT 12.
The confidence placed in this model will be rewarded by the efficient and economical
performance of the machine.
These operating instructions contain all information necessary for the correct use of the
machine. Please read them carefully before putting the machine into operation and
make sure that they are kept at hand at all times.
Should you need further explanations or should anything be unclear, please contact
your dealer immediately.
Special equipment and attachments are not included in these operating instructions.
We reserve the right to make improvements on the machine within the scope of
impending technical developments, without incurring any obligation to change these
operating instructions.
Note
Any modifications of Schaeff products and their equipment using extras and work
attachments which are not included in our product range require our written
approval. If our approval is not sought, our warranty expires, as does our product
liability for any resulting consequential damages.
Note
The
vehicle
identity
backhoe excavator is stamped on the
identification plate located on the slide.
Please state the machine type and the
machine identity number when making
inquiries or orders, and in all written
correspondence.
Our address :
Head Office / Sales
Karl Schaeff GmbH & Co.
Maschinenfabrik
Postfach 61 • D-74595 Langenburg
Schaeffstr.8 • D-74595 Langenburg
Tel. +49 7905 58-0
Fax +49 7905 58-114
HT 12 Unimog 1.96
number
of
the
Service
Karl Schaeff GmbH & Co.
Maschinenfabrik
Postfach 1264 • D-91534 Rothenburg
Erlbacher Str. 113 • D-91541 Rothenburg
Tel. +49 9861 972-451
Fax +49 9861 972-460
Spare Parts
Schaeff Ersatzteile-Service
GmbH & Co.KG
Postfach 12 64 • D-91534 Rothenburg
Erlbacher Straße 113 • 91541 Rothenburg
Tel. +49 9861 972-0
Fax +49 9861 972-410
1
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Table of Contents
Summary of Contents for Schaeff HT 12
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Page 1: Introduction
Note Any modifications of Schaeff products and their equipment using extras and work attachments which are not included in our product range require our written approval. If our approval is not sought, our warranty expires, as does our product liability for any resulting consequential damages. -
Page 2: Proper Use
Your which is suitable for the function of the Schaeff backhoe excavator fulfils these machine and its work implements. requirements when correctly handled Such work involves loosening, taking up,... -
Page 3: Delivery And Handing-Over Instructions
• Explanation of warranty covered by manufacturer • Explanation of inspection cards and note on maintenance and inspection plan • Correct filling warranty/handing-over card returning the latter to Schaeff 1.5 Notes on using the instruction book HT 12 Unimog 1.96... -
Page 4: Accident Prevention
HT 12 Unimog 1.96... - Page 5 Attention When working under the raised work equipment, it is essential to secure the latter by appropriate means. HT 12 Unimog 1.96...
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Page 6: Technical Data
3 Technical data 3.1 Working diagram Fig. 4 HT 12 Unimog 1.96... -
Page 7: Dimensions And Weights Without Mounting Group
3.3 Hydraulic system - Technical data Power required for hydraulic system 20 - 28 kW Working pressure 175 bar Capacity 70 - 80 l/min Tank filling quantity approx. 54 l max. 90°C ( ΔT 60°C ) Hydraulic oil temperature HT 12 Unimog 1.96... -
Page 8: Lubricant Specifications
Hydraulic system: Mineral hydraulic oils The limit values for hydraulic oils which can be used for Schaeff construction machines and attachments are approx. 12 mm ²/s (cSt) at 100°C and approx. 1500mm ²/s (cSt) at -10°C. See also hydraulic oil recommendation chart for Schaeff construction machines and attachments. -
Page 9: Other Equipment
- Further optional equipment available on request - Note Any modifications of Schaeff products and their equipment using extras and work attachments which are not included in our product range require our written approval. If our approval is not sought, our warranty expires, as does our product liability for any resulting consequential damages. -
Page 10: Mounting And Dismounting Instructions
• Loosen the hydraulic connection for the excavator and the tilt cylinders. Connect the air hose to the return line hose on the host vehicle. • Protect the connection hoses of the backhoe excavator from contaminations. fig. 6 HT 12 Unimog 1.96... -
Page 11: Operation
5 Operation 5.1 Operator controls Fig. 7 Operator control for excavator equipment Operator control for excavator equipment Operator control for stabiliser, right Operator control for stabiliser, left Slide lock Overload warning device HT 12 Unimog 1.96... -
Page 12: Making The Backhoe Excavator Ready For Operation
When working with the backhoe excavator slewed sideways we recommend employing an additional support in order to improve the stability of the Unimog with the HT 12 attached. When the excavator is slewed sideways, the additional support (9/1) on the supporting foot, to which the excavator is slewed, must be employed. -
Page 13: Excavator Operation
Incorrect operation may endanger persons or objects. Before commencing work, memorise the lever controls well. Commence at low engine speed when familiarising yourself with the controls. 5.3.2 Actuation of work equipment 5.3.3 Actuation of stabilisers HT 12 Unimog 1.96... -
Page 14: Lateral Adjustment Of The Work Equipment
Take care to ensure that the slide is clamped in the proper manner. Danger of accident Note When working, the ball valve must always be closed and may only be opened for lateral adjustment. HT 12 Unimog 1.96... -
Page 15: Crane Operations
The machine operator must carry loads as close to the ground as possible and prevent them from swinging. Machines may only travel with an attached load if the path of travel is fairly even. HT 12 Unimog 1.96... -
Page 16: Carrying Capacities
These values are determined according to DIN 15019 page 2 and presented according to DIN 24083. Values in brackets : Values correspond to the hydraulic lifting force and only apply in the longitudinal direction (vehicle longitudinal axis) with the undercarriage supported. HT 12 Unimog 1.96... -
Page 17: Changing Work Attachments
Procedure for changing attachments Lower the work attachment to the ground and position so that it cannot tilt. Remove the pins which connect the attachment to the dipperstick and the bucket rod. Mount another work attachment. HT 12 Unimog 1.96... -
Page 18: Transport Position When Driving On Public Roads
• Position both lock pins (10/1) between the mounting frame and mounting device in posi-tion „locked“ • Fold down the driver’s seat and secure • Extend the stabilizers • Release the parking brake, apply the steering lock • Bring the boom to its working position HT 12 Unimog 1.96... - Page 19 10 HT 12 Unimog 1.96...
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Page 20: Care And Maintenance
500 operating hours Note The three inspections are obligatory and must be paid for. If they are omitted, the warranty may be subject to restrictions. It is essential that the recommendations in chapter 2, “Accident Prevention”, are observed. HT 12 Unimog 1.96... -
Page 21: Inspection Parts And Aids
If lubricants which do not conform to our recommendations are used, consequential damages may occur for which we will not assume liability, even inside the warranty period. For lubricant specifications see section 3.4. HT 12 Unimog 1.96... -
Page 22: Care And Cleaning
4. Do not clean the operator’s seat with direct water, steam or high pressure jets. 5. After each wet clean, the machine must be lubricated in accordance with the lubricating plan and a test of all work cycles, support and driving functions carried out. HT 12 Unimog 1.96... -
Page 23: Daily And Weekly Tasks
Take care to ensure that the support for the mounting device is securely fastened on the host vehicle • Check the condition of the fastening parts for the mounting device and ensure that they are tightly fastened. • Check that the connection lines and hydraulic couplings function perfectly HT 12 Unimog 1.96... -
Page 24: Overview Of Lubricating Points
• In the event of special operating conditions, e.g. working on sandy ground, the lubrication intervals should be shortened, in order to encourage self-cleaning of bearing points. • Replace damaged grease nipples immediately and check if grease passes through. HT 12 Unimog 1.96... -
Page 25: Inspection Plan
Check function of electrical equipment Grease machine according to overview of lubricating points Check function, condition and completeness of safety equipment Hydraulic function check with pressure function test Test run and test work Initial inspection cards and return to Schaeff HT 12 Unimog 1.96... -
Page 26: Hydraulic Oil
• Fill with clean hydraulic oil via the filler and ventilation filter until the correct level on the sight glass (15/3) is reached. • Screw on the ventilation filter cap. • Check the tightness of the tank. HT 12 Unimog 1.96... -
Page 27: Hydraulic Oil Return Filter
7.9 Ventilation filter of hydraulic oil tank Change according inspection plan, section 7.6 Remove the ventilation filter (15/4) and replace it by a new one. Note Replace the filter, too, if the cap is dirty, e.g. due to oil mist. HT 12 Unimog 1.96... - Page 28 Check secondary valves and replace if necessary Impermissible degree of leakage of Check control valve, seal and the control valve replace if necessary 8.6 Trouble in the electrical system Lighting does not come on Check cables, connections, etc. HT 12 Unimog 1.96...
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Page 29: Table Of Contents
7.4 Daily and weekly tasks ..................... 23 7.5 Overview of lubricating points ................... 24 7.6 Inspection plan ........................ 25 7.7 Hydraulic oil ........................26 7.8 Hydraulic oil return filter ....................27 7.9 Ventilation filter of hydraulic oil tank ................. 27 HT 12 Unimog 1.96... - Page 30 8.3 Excavator equipment is not working ................. 28 8.4 Unit is working too slowly and system is becoming too hot ..........28 8.5 Hydraulic cylinders are not functioning satisfactorily ............28 8.6 Trouble in the electrical system ..................28 Anbaubagger HT12 Unimog 10.97 HT 12 Unimog 1.96...
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