6.6.2. Repair of a support of a brake of a forward wheel

Order of performance of repair work following:

1) preparation:

— uncover naves and a wheel;

— carefully clear a support;

2) merge brake fluid:

— remove a protective cap from the drain union, connect a hose and open the union;

— record a brake pedal in the pressed situation with the help of the holder;

— collect the coming-out brake fluid in capacity;

— defame a fastening bolt brake fluid of a hose;

3) remove a forward support assembled:

Fig. 6.5. Discharge of brake fluid

Fig. 6.6. Details of a forward support: 1 — a bolt with sealing washers; 2 — a bolt of the directing finger; 3 — a support; 4 — brake shoes

— turn out a bolt of 1 (fig. 6.6) of the banjo union with its consolidations;

— turn out two bolts 2 of the directing support fingers;

— remove brake shoes 4;

4) sort a support:

— put wooden whetstone in front of the piston;

Fig. 6.7. Vypressovka of the piston from a support

— carefully to a vypressuyta the piston by means of compressed air (fig. 6.7);

PREVENTION Be careful in avoidance a zazhatiya of fingers of a hand at a piston vypressovka.

— remove an antisplash cuff;

— remove a sealing ring so that not to damage an edge of flutes;

— turn out the drain union;

5) clear and check a condition of a support:

— wash out elements alcohol;

— check existence of wear, damages, cracks and a rust. If necessary replace elements;

— surely replace a sealing ring and an antisplash cuff;

— carefully clear channels and flutes for a sealing ring and an antisplash cuff.

In the presence in the cylinder рисок or scratches replace a support assembled.

Remove small deposits of a rust with a fine-grained grinding skin.

6) collect a support:

— blow details compressed air;

— grease with brake fluid of a surface of the cylinder;

— put a sealing ring in the cylinder;

— put an antisplash cuff on the piston;

— put the piston with an antisplash cuff in the cylinder against the stop;

— be convinced that the antisplash cuff rose on the place;

— put the drain union, tighten its moment 5 N · m.

7) check a surface of a brake disk. If the brake disk has roughness signs, check its side beating. If the brake disk is strongly worn-out, has furrows, replace it. Measure disk thickness (standards see in subsection. "Technical characteristics");

8) record a brake disk on a nave. Put wheel nuts the flat party and tighten their moment 110 N · m.

9) measure a side beating of a brake disk:

Fig. 6.8. Installation of the indicator for measurement of a side beating of a brake disk

— install the indicator to a brake disk (fig. 6.8);

— slowly rotating a nave forward by means of a face wrench determine a beating by the indicator. The most admissible beating of 0,04 mm. If the side beating exceeds norm, replace or, in the presence of the necessary grinding tool, grind a brake disk, basing it on a prileganiye surface to a nave.

NOTE The beating can be caused by a nave beating. If necessary it is necessary to check a side beating of a nave also.

Fig. 6.9. Measurement of a beating of a nave of a wheel

10) measure a side beating of a nave of a wheel:

— remove a brake disk;

— establish an indicator tip on a nave flange;

— slowly rotating a nave by means of a face wrench forward, define a beating. The most admissible beating of 0,05 mm. If the side beating of a wheel nave exceeds norm, zame6nite a nave (see chapter 7. "A forward suspension bracket and steering");

11) Check a guide of a support of a forward brake:

— check rubber plugs of the directing fingers, if necessary replace them;

— grease if necessary fingers with silicone jellied Volvo lubricant (number of a detail 1161325-4) and implant them into rubber plugs;

12) put brake shoes, having checked the wear indicator;

13) establish a support on the directing fingers. Bolts of fastening of a support tighten the moment of 35 N · m;

14) connect a brake hose, using new consolidations. Tighten its moment 15 N · m; be convinced that the brake hose is not overwound.

15) pump over the brake system (see subsection. "Pumping of the brake system");

16) put a wheel and slightly tighten nuts. Then tighten them on diagonal the moment of 110 N · m.