T 188

T 188
Manufacturer:	VEB Weimar factory
Production period:	from 1988 to 1990
Previous model:	T 185
Successor:	Weimar M 1000 A
Motor type:	4 VD 14.5 / 12-1 SRW
Engine power:	50 kW / 68 PS
Engine manufacturer:	VEB engine plant Nordhausen
Swivel range :	360 °, continuous
Dimensions:	10,800 kg to 12,500 kg (depending on equipment)
Length:	6800 mm
Height:	3500 mm
Width:	2500 mm

The T 188 was the last series of excavator production with hydraulic drive in the VEB Weimar factory .

When clamshell of the deleted Bucket necessary hydraulic cylinder on the jib, via its circuit , the hydraulic cylinders instead are controlled on the gripper.

The T 188 was a further development of the T 185 , from which the superstructure was taken over. Important innovations were the joystick control and the panorama cabin for improved working comfort. A sliding plate or optionally a 4-point support as well as the fully hydraulic implement control and the hydraulic travel drive were important and necessary improvements compared to its predecessor. The four-cylinder in-line diesel engine 4 VD 14.5 / 12-1 SRW was a standard engine from the Nordhausen engine factory, the more powerful versions of which were also used in the ZT 320 and W50 . The axles were taken over from the L60 for reasons of material economy and to make subsequent maintenance more efficient . The high-performance hydraulic pumps with working pressures of up to 320 bar were completely redeveloped.

The first sample was tested in 1983. A total of 378 units were built in 1988 and 1989. The load capacity is specified as 3.6 t, depending on the boom adjustment. A total of 29  attachments were available, most of which could be used by the T 174 . The excavator has two forward gears (5 and 20 km / h), one reverse gear (5 km / h) and a differential lock to ensure good propulsion even in the field. The gradeability is given as 45 °.

Technical specifications

General performance indicators

Characteristic value	power
maximum load capacity with auxiliary hook on the excavator bucket	1.5 t
maximum load capacity in grab operation	1.7 t
maximum scraping force in excavator operation	65 kN
Handling performance with gripper	150-250 t / h
Excavator performance with backhoe	40-60 m³ / h
Slope limit	1.5 ° without reducing the load capacity
	5 ° with reduced load capacity
Driving speeds
Street gang (1st gear)	0 to 20 km / h
Off-road gear (2nd gear)	0 to 5 km / h
Reverse gear	0 to 5 km / h
Gradeability on paved roads
Street gang	10%
Off-road gear	50%
Application limits
minimum ambient temperature	−20 ° C
maximum ambient temperature	+40 ° C

Weimar T 188 excavator in version A03 (with outriggers and sliding blade) with the monobloc boom that is rarely installed

Performance parameters undercarriage

Characteristic value	power
wheelbase	2600 mm
Front / rear track	1959/2009 mm
Ground clearance under the axle	330 mm
Oscillation angle of the front axle	+ - 6 °
Turning circle diameter	15.0 m
Tires	16 / 70-20 14 PR A19 (405 / 70-20)
Air pressure	4.5 bar

Performance parameters of the superstructure

Characteristic value	power
rear projection	2000 mm
Engine power	50 kW
Engine speed	1500 rpm
Fuel consumption	7.0-8.5 l / h
fuel	diesel
Contents of the diesel tank	150 l
Superstructure speed	6.2 / min

Performance characteristics hydraulic system

Characteristic value	power
Number of independent working groups	6th
maximum working pressure
landing gear	320 bar
Working cylinder	250 bar
Slewing gear / special consumers	200 bar / 100 bar
steering	120 bar
Control hydraulics	30 bar
maximum delivery rate	2 × 87 + 46 + 15 (l / min)
Nominal capacity of the hydraulic oil tank	185 l
Oil filter	25 μm / 10 μm

Electrical system

Characteristic value	power
Voltage in the vehicle electrical system	24 V
Battery 12 V	2 × 135 Ah
Alternator power	500 W
Headlight setting value x	17 cm

Net dimensions and contents of the approved work tools

Tool type	Type number	Load capacity	own weight	photo
Load hook	KN 800	3600 kg	18 kg
Grapple frame	KN 400		340 kg
Bulk tray	CN 249	0.4 m³	260 kg
Bulk tray	KN 440	0.6 m³	265 kg
Bulk tray	KN 258	0.8 m³	385 kg
Bulk tray	KN 441	1.1 m³	400 kg
Tine bar	KN 257	0.6 m³	270 kg
Tine bar	KN 445	1.0 m³	285 kg
Grab cage	CN 259	0.8 m³	280 kg
Grab cage	KN 446	1.3 m³	400 kg
Backhoe bucket with auxiliary hook	KN 602	0.4 m³	310 kg	KN 602 backhoe bucket with auxiliary hook

literature

• Horst Hinterdorf: GDR tractors and agricultural machinery , Motorbuch Verlag, ISBN 978-3-613-02782-4

Web links

Commons : T 188  - collection of pictures, videos and audio files

• Website about the T 188