Maintenance Manual STEMME S10-VT
Date of Issue: Jan. 01, 1998
Page 7-29
Amendment Nr. 22
Date: Jan. 10, 2014
A4011121_B23.doc
Doc. No. A40-11-121
7.5.1.4 Tires, condition and inflation pressure
The tires must be replaced at the latest, if the profiles are worn thin. Pay attention to the slip marks rim/tire.
Apply LOCTITE (metal glue) to the attachment screws on the wheel axles.
NOTE:
The left wheel attachment bolt has a left hand thread.
Inflation pressure
3.2 ± 0.1 bar / 46.5 ± 1.5 p.s.i. (optional wide tires: 2.6 ± 0.1 bar / 37.7 ± 1.5 p.s.i.)
7.5.1.5 Adjustment and ventilation of the wheel brake system
Hydraulic Brake System (TOST Brake System)
Refilling and Ventilation of hydraulic Brake System (refill with brake fluid DOT 4)
Install transparent flexible hose and drain bottle at the three venting ports of the parking brake valve and
at the left and right brake calliper
Open the venting valve of the parking brake valve.
Refill brake fluid by plastic injection nozzle to the brake fluid reservoir in landing gear bay (use sealed
adapter) until the brake fluid passing through the transparent flexible hose at the parking brake valve is
free of bubbles. If required release/remove RH brake lever and slightly swing with upside down attitude.
Close venting valve at the parking brake valve.
Open venting valve at the LH brake calliper.
With continuous refilling of brake fluid to the brake fluid reservoir as required pump the brake fluid
through the hydraulic brake system by operation of the RH brake lever until the brake fluid passing
through the transparent flexible hose at the venting valve of the LH brake calliper is free of bubbles. If
required release/remove LH brake lever and slightly swing in upside down attitude.
Close venting valve at the LH brake calliper.
Open venting valve at the RH brake calliper.
With continuous refilling of brake fluid to the brake fluid reservoir as required pump the brake fluid
through the hydraulic brake system by operation of the RH brake lever until the brake fluid passing
through the transparent flexible hose at the venting valve of the RH brake calliper is free of bubbles.
Close venting valve at the RH brake calliper.
Operate LH and RH brake lever for inspection.
=> A clear pressure point has to identifiable during operation! Otherwise repeat ventilation procedure!
Reinstall brake lever (if applicable).
Remove transparent flexible hose and check final brake fluid level at brake fluid reservoir.
Perform functional check of brake system with pre-flight check according Flight Manual, Ch. 4.
Hydromechanical Brake System
The brakes are equipped with an adjustment device at the bowden cable and with an adjustment screw at the
lever of the master brake cylinder. If after mechanically adjusting the brake operates still ‘soft’, the hydraulic
system must be vented.
Adjustment of the Bowden Cable Operation
If there is a drop in breaking efficiency, first check the adjustment of the bowden cable leading from the
actuating lever on the control stick to the lever at the brake master cylinder in the wheel well. Adjust the cable
for minimum play between cable and lever at the master cylinder, without pre-loading the bowden cable. If
required, additionally the play between brake piston and the adjustment screw of the lever at the master
cylinder may be reduced, without producing a pre-load between piston and adjustment screw.
CAUTION:
Between the brake piston and the adjustment screw of the lever at the master cylinder a little play
is required with the brake relieved. Otherwise there is a danger of brake jamming which is not
evident immediately. It can cause destruction of brake linings or brake disks.
