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I have a hyundi sl180 with a zf 4wg200 transmission for which i wish to know the trouble shooting hydraulic pressures

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Lost steering to left side of my new holland sl125 skid steer, what's first place to look, trouble shoot


Faulty valve in your hydraulic line or faulty motors. More likely a valve tho. Check output pressure from joystick

Aug 29, 2016 | Cars & Trucks

1 Answer

Why is the clutch on the floor


Clutch "on the floor" is rather unusual... Most of all clutch spring is the feel of the pressure plate holding the clutch disc against the flywheel... but there is typically a pedal return spring that will take out the slack before ANY pressure is applied to your throw-out bearing.

Clutch MALFUNCTIONS will affect gear engagement... excepting (of course) clutch slippage.

For this trouble you need to take a quick look under the dash at the pedal hangers... and piston plunger that activates the clutch cylinder (typically on the outside of your firewall).

Now look at the clutch MASTER cylinder... the connecting HOSE and the SLAVE cylinder. Any fluid TROUBLE IS THE KEY to your trouble.

The ideal TROUBLE would be a split hose... but compared to a FULL CLUTCH rebuild all of these parts are cheap and easy to replace. Typically only requiring bleeding the cylinders... and you are back on the road.

If everything looks good you are MOST PROBABLY going to need a new clutch master, slave, hose and appropriate hydraulic fluid.

BUT if you have NOT found that TELL-TALE hydraulic fluid... you had better have an ASSISTANT operate the clutch pedal while you determine were that MALFUNCTION is located.

If the pedal is working the clutch lever on the transmission... you are looking at a SERIOUS clutch rebuild.

ALWAYS REMEMBER to work on level ground, chock your wheels and use good jack stands... like your life depends on it... before getting under ANY CAR... It does!

Good luck and here's a wish for a cracked HYDRAULIC HOSE...!!

Dec 20, 2015 | Nissan Tiida Cars & Trucks

1 Answer

Hydraulics just stopped all of a sudden with bucket up. it will not move at all. what is the trouble shooting steps to follow


OK AL:
SAFETY FIRST!!!!!!!!!!!!!!!
The bucket up is DANGEROUS!
Get some blocking under it before you do anything.

If it were me, I'd find a way (Winch, Crane, Other machine, ???)
to safely support the bucket, then find a way to bleed the lift cylinders to allow the bucket to be lowered to the ground.

Then and ONLY then, I'd be looking at the hydraulics functions to determine if it was a valving or pump problem.

Jul 27, 2015 | Cars & Trucks

1 Answer

ZF5HP19 TRANSMISSION REVERSE PROBLEMS


Common fault with the reverse drum in transmission.
BMW are in all sorts of trouble over this transmission. Some people have had expensive BMW repairs - Are you mechanical...there are a few guides on how to fix, google your zf number, otherwise Transmission specialist may have had a few prior repairs on these

Apr 11, 2013 | 1999 BMW 323 Series

1 Answer

1990 ford f250 5 speed zf trans just had transmission rebuilt truck still jumps when i take off in second


Check your motor and transmission mounts. Not much into the slave cylinder, but on hydraulic cylinders there is sometimes a run-out where the hydraulic pressure is too weak to do the job. This sometimes happens with the shaft leaking internally and allowing pressure to bypass the valving. But you have a different one, is it good?

Consider a shock absorber. The first push it can make, then it does not refill the void fast enough to make the second push. Because of engine reving, you jump from 1 to 2 quicker than 2 to 3 gear. The slave cylinder does not have enough time to refresh. Maybe look at the weight of the oil in the slave cylinder.

Mar 30, 2012 | 1990 Ford F150

1 Answer

94 toyta pickup chage starting hard shifting gear replace slay slender not solve -change clutch not slove problem change clutch hyd master cylender not sloved broblem some one say chage transmission- what...


If you're sure that the clutch hydraulics are working properly ... then you are going to need to pull the transmission to see why the release isn't working .... bad throw out bearing, problem with pressure plate or ??

Trouble shooting here:
http://www.ncttora.com/fsm/1993/clutch/1troubles.pdf

Aug 21, 2011 | 1994 Toyota Pickup

2 Answers

I bought a 1998 mitsubishi eclipse and the check engine light came on we hooked up the machine to diagnos it and we got 2 codes po700 and p1784 . we are wondering what the codes mean and how to fix the...


DTC 1784: LOW-REVERSE PRESSURE SWITCH
1.Remove transaxle relay from connector. Turn ignition on. Install scan tool and observe low-reverse pressure switch condition. Apply battery voltage to transaxle relay connector terminal No. 8. If low-reverse pressure switch stays off, go to next step. If low-reverse pressure switch turns on, go to step 4 .

2.Raise vehicle enough to allow drive wheels to spin freely. Test low-reverse clutch hydraulic pressure. See HYDRAULIC PRESSURE TESTS under TESTING. If low-reverse clutch pressure test is not within specification, internal transaxle failure exists. If low-reverse clutch pressure test is within specification, observe scan tool.

3.If low-reverse pressure switch turns on, trouble code is intermittent. Check wire harnesses and connectors for damage or poor connection. If low-reverse pressure switch does not turn on, replace solenoid and pressure switch assembly. Recheck trouble codes. If trouble code resets, replace TCM.

4.Check and repair wiring harness between transaxle relay connector and solenoid and pressure switch assembly connector. If wiring harness is okay, check wire between TCM connector terminal No. 10 and solenoid and pressure switch assembly.

5.If wire between TCM connector terminal No. 10 and solenoid and pressure switch assembly is okay, check TCM and solenoid and pressure switch assembly connectors. Repair connectors as necessary. If connectors are okay, recheck trouble codes. If trouble code resets, replace solenoid and pressure switch assembly. Recheck trouble codes. If trouble code resets, replace TCM.

P0700-The Transmission Control Module (TCM) monitors the malfunction of sensors and actuators relating to transmission control. When the TCM detects a malfunction with the control, a signal is send to the Engine Control Module (ECM) to trigger the Engine Light or Service Engine Soon light. The ECM stores the P0700 code and it means the TCM detected a malfunction with the transmission controls.

I would try disconnecting he battery and letting it sit for 5 minutes, then hook it back up to see if they return-the 700 code is probably related to the 1784 code, that seems to be your main issue.

Jun 06, 2011 | 1998 Mitsubishi Eclipse

1 Answer

How to trouble shoot the brake system?


To trouble shoot the brake system you have to check:AntiLock Brake System ABS:
Hydraulic Modulator
Basically this unit holds steady or bleeds off pressure in brake line, as necessary, when the Electronic Brake Control Module (EBCM) detects an abnormal deceleration in the speed of the wheel. On 2000 and later models the EBCM and Brake Pressure Modulator Valve (BPMV) are mounted on a bracket attached on the left strut tower.
Wheel Speed Sensors, brake fluid level, brake hoses and lines, inspect and replacement, Brake hydraulic system-bleeding, Brake light switch, check, adjustment and replacement.
Disk brake caliper, disk brake pads, drum brake shoes, master cylinder, master cylinder reservoir, O-rings replacement, parking brake adjustment, parking brake cables inspect and replacement, parking brake shoes-replacement, power brake booster, check or replacement, wheel cylinder inspect and replace.

Oct 10, 2010 | 2000 Chevrolet Venture

1 Answer

03 dodge caravan, 105,000 miles, 2.4L transmission will shift in all gears but will not go into overdrive from 3rd gear. when it does shift to overdrive i try to speed up on the gas and it shifts back into...


I'm afraid that the transmission's O/D solenoid malfunctioning or kick down cable may be misadjusted if so equipped.

looking at a rebuilt transmission if you plan to keep the Caravan.

Or, alternatively, could get a low mileage transmission from a salvage yard and have it installed.

----
Servos/Accumulators The servos are hydraulic pistons and cylinders. They resemble the hydraulic actuators used on many other machines, such as bulldozers. Hydraulic fluid enters the cylinder, under pressure, and forces the piston to move to engage the band or clutches.
Servo operation tccs7015.gif

The accumulators are used to cushion the engagement of the servos. The transmission fluid must pass through the accumulator on the way to the servo. The accumulator housing contains a thin piston, which is sprung away from the discharge passage of the accumulator. When fluid passes through the accumulator on the way to the servo, it must move the piston against spring pressure, and this action smoothes out the action of the servo.
Hydraulic Control System The hydraulic pressure used to operate the servos comes from the main transmission oil pump. This fluid is channeled to the various servos through the shift valves. There is generally a manual shift valve, which is operated by the transmission selector lever, and a shift valve for each up shift the transmission provides.
Most automatic transmissions are electronically controlled; electrical solenoids are used to control the hydraulic fluid. The shift solenoids are regulated by an electronic control module. Shift timing is regulated through sensor feedback information provided to the electronic controller.
On older transmissions there are two pressures that control the shift valves. One is the governor pressure which is affected by vehicle speed. The other is the modulator pressure which is affected by intake manifold vacuum or throttle position. Governor pressure rises with an increase in vehicle speed, and modulator pressure rises as the throttle is opened wider. By responding to these two pressures, the shift valves cause the up shift points to be delayed with increased throttle opening to make the best use of the engine's power output.
Older transmissions also make use of an auxiliary circuit for downshifting. This circuit may be actuated by the throttle linkage, vacuum that actuates the modulator, or by a cable or solenoid. It applies pressure to the downshift surface on the shift valve or valves.
The transmission modulator also governs the line pressure, used to actuate the servos. In this way, the clutches and bands will be actuated with a force matching the torque output of the engine.
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Aug 09, 2010 | 2003 Dodge Caravan

1 Answer

6.5Lchev diesel to a ford ZF 5 speed gear box


You will need the Chev pressure plate to suit the Chev flywheel and a clutch plate to suit the Ford ZF gearbox. Ford ZF throwout bearing and clutch fork should be fine.

Jul 01, 2009 | 1981 Ford F 100

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