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Lubrication 

(Fig. 55) 

 
Lubrication should be carried out with great care since the working 
order of the mechanism depends on it entirely. 

 

Since the details are treated in accordance with special instructions to 
prevent the lubricant from spreading over the surface, the surface 
treatment should not be damaged in any way. 

 

Lubricant 

 

The following part should be lubricated with MTK 21 (apply very sparely 

so 

that there is no risk of the lubricant spreading). 

 

Teeth of the centre gear wheel, to be rolled on lint-free felt (7, fig. 
45) 

 

Teeth of the intermediate drive gear (1, fig. 37) 

 

Gear of the intermediate drive gear, to be rolled on lint-free felt (3, 
fig. 37) 

 

The dog spring (7, fig. 37) 

 

The bearing hole in the impulse wheel (4, fig. 37) 

 
The lubricant is applied after the impulse wheel has been mounted on 
the shaft. 
 

Grease 
 

Grease MTV 37 is applied at the following points, whereupon it should 
be observed that grease maybe applied more liberally than lubricant. To 
apply the grease, a syringe without needle should be used. See the 
section on tools. 

 

The bearing of the main shaft and those of the disc against the 
frame and bearing plate (Pos. 18, 28, 37 and 19, fig.55). 

 

The intermediate shaft bearing in frame and bearing plate  

 

(Pos. 18, 27 and 26, fig. 55). 

 

Governor shaft bearing in frame bearing plate (Pos. 18, 10 and 26, 
fig. 55). 

 

Sliding surface between the lifting spring's short-circuiting group 
and the lifting stud of the main gear wheel (9, fig.50). 

 

Sliding surface between the stand-switch plunger shaft and the 
main shaft hole (2 and 4, fig. 45). 

 

Sliding surface between the stand-switch plunger shaft and the 
locking spring (2 and 4, fig. 36). 
 

Lubricate the sliding surface between the top of the stand-switch plunger 
top and the stand-switch plunger springs very sparingly. This also 
applies to the sliding surfaces between the impulse wheel retaining 
springs and the bearing plate and dog washer, respectively. (5-8, 6-2, fig. 
37). 

13 

4.2 Lubrication

 

Содержание Ericofon

Страница 1: ......

Страница 2: ...heck and adjustment 4 2 Lubrication 4 3 Mechanical check 4 4 Electrical check 5 Adjustment and testing instructions for field use 16 6 Spare parts 17 6 1 Spare parts instruction 6 2 Location view and...

Страница 3: ......

Страница 4: ...onents but also because of its excellent transmission data and extremely delicate design The millionth Ericofon was delivered during 1964 Photos 1 and 2 show three versions of the Ericofon From the le...

Страница 5: ...in types of exchanges The earth button is removed from the housing by unscrewing the threaded nipple fig 6 The manual Ericofon photo 7 which has no dial has a much simpler mechanism than the other ver...

Страница 6: ...indle can be removed These details are kept in position by a retaining ring which can be opened This completes the dismantling of the base assembly the details are reassembled in reverse order Fig 25a...

Страница 7: ...ter Component Data Fig 28 The BC unit consists of capacitors a resistance e and a buzzer on a mounting plate The buzzer consists of a cup with the coil d armature c and adjustment screws for sound reg...

Страница 8: ...Earlier types of Ericofon used a spiralized textile cord which has now been replaced with a spiralized PVC cord Each conductor in the cord consists of several copper wires Depending on the installati...

Страница 9: ...auge is used when adjusting contact gap LMV 1111 and Weights to be used when determining spring LMV 1115 tension of the dial VRT 2503 Dial Tester 10 ml Grease gun and grease cup for grease MTV 37 Bott...

Страница 10: ...3 Retainer plate Fig 36 The retainer plates 1 should be locked firmly against the bearing plate and the lugs symmetrically stretched Before the retainer plates 1 are assembled they should be lubricate...

Страница 11: ...should be smooth and free from porosity The governor axial play should be 0 07 0 25 mm the play is adjusted by bending the tongue of the bearing plate Base plate Fig 40 The base plate should be free...

Страница 12: ...finger wheel and exert such a tension that a pressure of 25 5 g is required to actuate the plunger Springset vertical Fig 46 The mounting hole of the vertical 1 should be concentric with correspondin...

Страница 13: ...essed on dialling Receiver springs earlier types Contact pressure and height are adjusted as in fig 51 Transmitter springs Fig 52 The transmitter springs are adjusted as in fig 52 Induction coil Fig 5...

Страница 14: ...whereupon it should be observed that grease maybe applied more liberally than lubricant To apply the grease a syringe without needle should be used See the section on tools The bearing of the main sha...

Страница 15: ...ernor cup 1 2 fig 39 The sliding surface between the impulse wheel and the impulse spring 4 9 fig 38 Under no conditions may lubricants other than those specified above be used and lubricant oil may n...

Страница 16: ...21 Voltage test Make a routine test with 500 VS M between all line parts mutually between all line parts and housing Insulation test Snap Random check 1 000 megohms at 500 V between the same parts as...

Страница 17: ...ltirange instrument soldering iron and telephone receiver For the sake of clarity certain parts have been omitted such as resistor case and wall termination box etc Fault indication Possible fault Act...

Страница 18: ...ial parts table 1 12 item Begin from the Ericofon number If this has been mislaid the number can be obtained by comparing the Ericofon against the Code key which is to be found at the end of the servi...

Страница 19: ...can be found in the little table at the lower right hand corner of the spare parts list Resistors in the instruments are colour coded according to the table below Colour 1 2 3 Tol Voltage O Black 0 0...

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