Will go forward and reverse,but will not lift or down

Check hydraulic level and leak detector.

I tried the
DIY service and repair manuals from a website and it actually helped me repair transmission problem in my jcb 3cx site-master. it wont move forward or reverse, engine is good both solenoids for forward and reverse work.
I don't have much technical knowledge but I just followed it step-wise, and works perfect! got it from www.reliable-store.com

Boat out of the water.
Tilt the drive entirely.
You'll see right under the exhaust bellows an stanless steel construction with 'hooks'
There is a link coming from your selector leverthat will lift those hooks when in forward, and let them go down in reverse.
Those hooks must grab the horizontal shaft in the transom.
Check if the hooks can turn freely ( they must stay aligned with the horizontal shaft) and if they go up and down when moving forward or reverse...

the lock down only operates in reverse gear and is used to stop the motor lifting up when you want to go in reverse
other wise it will not lock down in forward gear as there is a requirement for the leg to jump over submerged objects with out breaking the leg off

you have to be more specific here I do not understand what you are trying to say on here and to get help from someone you have to tell us what you have and exactly what you problem is to get help

you have air in your hydrolic line crack open line and let the air bleed out

Does it crunch? If you lift the clutch and then press it down whilst trying to get it into reverse as this lets the cogs move allowing you to slip the drive into the gears this may allow you to get it into reverse. So here's the steps:
1 start the the engine
2 drive the car for about 10 kms
3 try and get the vehicle into reverse
4 lift the clutch whilst holding the stick in the gate ( you should feel the cogs turning and shaking the stick)
5 then push the clutch down again
6 if it still won't go repeat step 4/5
if it still won't work then try and get it into reverse whilst stationary and then start the engine it will jolt but can free up the gears!

hope this helps :)

I had the same problem. The problem is to do with the little cog in the back of the helicopter that drives the tail rotor. If you reverse the helicopter it creates downward movement but if you fly forward it creates lift. This lift can actually cause the white plastic gear wheel to also lift and it looses contact with the drive cog itself. Undo the two screws to lift off the black casing, prize off the white plastic cog and file the underside down slightly. When you put it back in place it now sits slightly lower and does not lift too high when you fly the helicopter forward. Hope this helps.

Check for blown fuses and check the reverse solenoid. You can swap the forward solenoid with the reverse one. If it works, then replace the solenoid.