Urrea 2012 Manual De Usuario Y Garantía página 12

E N G L I S H
Testing automatic transmission vacuum
operated modulator valves
Automatic transmissions are normally equipped
with a vacuum operated modulator valve in
order for the automatic transmission to detect
engine loads and adjust shift points to suit.
The testvac vacuum pump can be used to test
both that the modulation valve diaphragm is
serviceable and also to simulate varying engine
loads so modulator pressure readings can be
recorded. To test the modulator valve diaphragm
remove the vacuum supply line from the valve
and attach the testvac vacuum pump. Operate
the vacuum pump until approximately 15 inHg
is archieved and monitor the gauge reading
for approximately 30 seconds. No vacuum drop
should be noted.
To check modulator pressure readings attach
a pressure gauge to the appropriate port on
the transmission. Remove the vacuum supply
line from the modulator and attach the testvac
vacuum pump. Start and run the engine and
apply vacuum pressures. Monitor readings and
confirm that these are in conformance with
manufacturer specifications.
BRAKING SYSTEMS
Testing brake booster diaphragm
Remove vacuum supply line from brake booster
lifting. Attach testvac vacuum pump to vacuum
supply port on booster. Operate pump to create
approximately 15 inHg in vacuum booster and
allow to sit for 30seconds. No vacuum booster
and allow to sit for 30 seconds. No vacuum
drop should be noted on the gauge reading. If
the vacuum drops this indicates that the brake
booster diaphragm is faulty. In this case the
booster should be removed for overhaul by
authorised repairer or replaced.
12
Brake bleeding
Ensure that vacuum pump is connected to the
brake bleeder reservoir in accordance with the
assembly diagram. Failure to do so will result in
brake fluid being drawn into the vacuum pump.
1. Draw contaminated fluid from master cylinder.
Replenish with new fluid.
2. Remove and clear bleeder screw. Apply silicone
grease to thread to preent air being drawn past
thread.
3. Attach suitable bleeder fiting to bleed screw.
4. Operate vacuum pump until approximately 2
inHg vacuum is created in container.
5. Open bleed screw. Allow fluid to be drawn
until new fluid is visible in clear hose.
6. Close bleed screw.
1. 7. Top up mater cylinder reservoir after each
wheel..
SISTEMAS DE FRENOS
# Description
Gauge
1
Release valve screw
2
Hose fiting
3
Container
4
Container cap
5
Hose kit
Two 6 x 9 x 500 mm PVC hose
6
One 6 x 9 x 100 mm PVC hose
Brake bleeder fittings kit
7
12 Assorted fittings kit
8
A, B y C