How does a troll valve work?
Like the noise suppression valve, a trolling valve works by deliberately reducing the hydraulic pressure to the piston to allow slip between the FPs and SPs, thereby slowing the rotation of the propeller below its normal speed. Trolling valves can be either mechanical or electronic.
Are trolling valves adjustable?
A trolling valve is an adjustable pressure-regulating device incorporated in the hydraulic system of the transmission that allows the pressure to be regulated between 0 and full operating pressure (typically between 250 and 400 PSI).
How does a ZF Marine transmission work?
(ZF makes a two-speed marine gear.) In some installations counter-rotation of the propellers is actually accomplished by simply swapping the linkage so that the opposite gear set is engaged when the lever is moved. The other function of the marine transmission is to set the ratio between engine rpm and propeller rpm.
What is a marine transmission?
A marine transmission — or marine gear — is a wondrous thing. It couples all the torque a big diesel or gas engine can deliver to the shaft that spins the propeller, so it must be built like a tank. Naturally, a marine transmission must thrive in the corrosive vapor bath of heat and salt that is an engine room.
What oil does a ZF Marine transmission take?
AMSOIL Synthetic 10W-30/SAE 30 Heavy Duty Diesel Oil is considered to be a straight-grade SAE 30. Here’s why this full synthetic SAE30 engine oil would be a great candidate for your ZF marine transmission.
What is a PTO on a boat?
A power take-off or power takeoff (PTO) is any of several methods for taking power from a power source, such as a running engine, and transmitting it to an application such as an attached implement or separate machine. In the case of a marine application, such shafts may be used to power fire pumps.
What causes a boat transmission to slip?
One of the biggest causes of transmission failure is too much throttle in reverse gear. It can happen when trying to keep the bow from hitting a piling, or when you’re trying to power the boat off the trailer at a shallow ramp, or stopping before you run over a downed skier.
Why do boats not use transmissions?
Boats do not have transmissions like cars because adding transmissions to a boat engine will cause undesired complexity, creating more problems such as cavitation, increasing the boat’s drag & fuel consumption, etc., for a small increase in speed. That’s why boats don’t have gears like cars do.
How do I check the oil in my ZF transmission?
The oil level check must be done two minutes after turning off the engine. The correct oil level is between the upper and lower marks on the dipstick (see Detail “A”). After the initial filling or after carrying out repairs or changing the oil filter, run the gearbox for about two minutes.
What is a PTO used for?
Power take-offs (PTOs) are mechanical gearboxes that attach to apertures provided on truck transmissions and are used to transfer the power of the vehicle engine to auxiliary components, most commonly a hydraulic pump.
What can you run off a PTO?
A PTO at the rear end of a farm tractor….Typical applications include:
- Running a water pump on a fire engine or water truck.
- Running a truck mounted hot water extraction machine for carpet cleaning (driving vacuum blower and high-pressure solution pumps)
- Powering a blower system used to move dry materials such as cement.