Service Manual 115-200 HP E-TEC Trim And Tilt [Servicing - Three Piston System]

Before removing the manual release valve, operate the unit to the full UP position, then run the unit down momentarily and loosen the reservoir cap one full turn.
To avoid personal injury, always wear eye protection when servicing the hydraulic unit. Since there might be significant residual pressure behind some components, cover each component with a shop cloth as you remove it.

Thoroughly clean the unit before disassembling. Scrub all outside surfaces with a stiff brush and hot, soapy water to prevent surface dirt from contaminating internal parts.

Do not apply heat to the cylinder body or cylinders. Excessive heat can cause high
pressure leaks or failure of parts.

Always use a lint free shop cloth when handling power trim/tilt components.

If painting the unit is required, paint it after it is completely assembled. Painting of individual components may cause flakes of paint to enter the hydraulic passages during assembly. Tape the trim/tilt piston rods before painting.

Screw the manual release valve in. Remove the retaining ring using retaining ring pliers. Remove the manual release valve.

Inspect O-ring and two plastic split rings on the manual release valve for nicks and cuts. Inspect tip of valve for damage. The two plastic split rings are not available separately. If rings are damaged, replace the manual release valve.

1. O-ring
2. Plastic split rings

Remove reservoir cap and drain the fluid into a container. Inspect the O-ring in the cap

1. Reservoir cap

Remove the three Pozidriv screws securing the reservoir to cylinder body. Remove reservoir.

41753

Remove the reservoir O-ring from the cylinder body. Check machined surfaces for nicks and scratches.

41759

1.O-ring

Use a 6 mm hex wrench to remove the plug from the cylinder body. Inspect the O-ring and the filter. Replace, if necessary.
41787

Remove the four screws securing motor to pump manifold assembly.

41760

Remove the wire shield from the pump manifold. Remove the motor and inspect the motor O-ring on the cable connector.

22878

Remove and inspect the coupler. Remove the filter screen from the pump manifold. Check the machined surfaces on the manifold for nicks and scratches. The pump manifold is not serviceable. Do not remove the pump or any control valves from the manifold. Clean the screen with a mild solvent and inspect it for tears, clogging, or other damage.

41763
1.Coupler
2.Filter screen

Remove the three Allen head screws securing the pump manifold assembly to cylinder body.

41798

IMPORTANT: Individual parts in the pump manifold assembly are not available separately. Do not remove pump or any control valves from the body.

Remove the manifold. Remove five O-rings from cylinder body. Check machined surfaces for nicks and scratches.

41799

Use Tilt Cylinder End Cap Remover/Installer, P/N 326485, or Universal Spanner Wrench, P/N 912084, and a breaker bar, to unscrew the tilt rod end cap.

Drain the fluid from above the piston.

Slowly pull the piston out with a rag wrapped around the rod and the top of the cylinder. Drain the remaining fluid from the cylinder.

41765

Inspect the bore of the tilt cylinder for excessive scoring. If the bore of the tilt cylinder is scored or damaged, the hydraulic assembly must be replaced.

41767

Clamp the rod eye tightly in a soft jaw vise. Remove the nut from the piston end of the rod.

41781

1.End cap

Remove the washer. Slide the tilt piston off the rod. Be careful not to lose the springs, plungers, or small check valves in the piston assembly.

41784

Remove and discard the small inner O-ring and large outer O-ring.

41819

1. Small inner O-ring
2. Large outer O-ring

Different tilt pistons are used on hydraulic units for various outboard models. All plungers and check balls are identical. The tilt piston assemblies contain valving specific to certain models. To provide impact protection, it is important the correct piston assembly be installed.

Three of the four springs are one length, and the fourth spring is shorter. On assembly, the shorter spring can be positioned in any hole in the piston.

41882

Piston check balls and plungers are identical. Lubricate and install a new outer O-ring on the tilt piston. Place one ball, one plunger, and one spring in each hole in the piston as indicated.

Three of the four springs are one length, and the fourth spring is shorter. On assembly, the shorter spring can be positioned in any hole in the piston. Set piston aside.

41818
Use a screwdriver to carefully pry the scraper out of the end cap. Discard the scraper. Remove and discard the large outer O-ring.

Remove and discard inner O-ring of the end cap.

Tilt Rod Assembly

Clean the end cap thoroughly, then lubricate and install a new O-ring in the end cap. Lubricate and install a new scraper. The scraper is installed with the lip facing out. Lubricate and install a new O-ring on the outside of the end cap.

41795

1. Inner O-ring
2. Lip
3. Outer O-ring

Use a wire brush to clean all thread-locking material from the threads on the tilt rod.

41821

Lubricate the inside surface of the end cap. Lubricate and install Tilt Cylinder Seal Protector, P/N 326005. Use a deep-well socket and a plastic mallet to drive the end cap onto the rod, then remove the seal protector. Slide the end cap down the tilt rod.

41824

1. Tilt Cylinder Seal Protector

Remove any lubricant from the threads on the tilt rod, prime with Locquic Primer, and let dry. Slide the piston assembly onto the tilt rod. Place a new rod O-ring over the threads.

41816

1.O-ring

Clean any thread-locking material from the threads on the inside of the nut. Spray threads of with Locquic Primer and let dry. Apply a small amount of Nut Lock to the threads. Slide the washer over the threads and install the nut. Torque to 58 to 87 ft. lbs. (79 to 118 N•m).

41783

To ensure that the tilt piston has been properly assembled and the impact relief balls are properly seated, apply Power Trim/Tilt & Steering Fluid on top of the tilt piston. Fluid should not leak past the impact relief balls while seated. If fluid does leak, disassemble the piston assembly and inspect the relief ball seats. Set the tilt rod assembly aside.

41828

Unscrew trim cylinder end caps using Trim Cylinder End Cap Remover/Installer, P/N 436710, or Universal Spanner Wrench, P/N 912084, and a breaker bar. Small pins must be used in the spanner wrench.

41829

Slide the caps to the end of the rods. Drain the fluid from the top of the pistons.

41837

Slowly pull each piston out with a rag wrapped around the rod and the top of the cylinder.

41838

Drain the remaining fluid from the cylinders. Inspect both bores of the trim cylinders for excessive scoring. If one or both trim bores are scored or damaged, the hydraulic assembly must be replaced.

41840
Remove and discard both back-up rings and the O-ring from each trim rod piston.

P/N 983213, clamp the rod tightly in a vise. Remove the thrust pad from the trim rod, then remove the end cap.

Remove the rod from the vise. Use a small screw driver to carefully pry the scraper out of the end cap. Discard the scraper.

41843

Use a suitable tool to remove the inner quad-ring and the outer O-ring. Discard the quad-ring and O-ring.

41844

Lubricate and install a new quad-ring and scraper in the end cap. Install the scraper with the bevel facing out. Lubricate and install a new O-ring on the outside of the end cap.

41845

1. Bevel
2. O-ring

Lubricate and install a new O-ring and two new back-up rings on the trim rod piston. Place one back-up ring on each side of the O-ring. Position the open end of the back-up rings 180° apart.

41847

1. O-ring
2. Back-up rings

Using Hydraulic Cylinder Rod Holder, P/N 983213, clamp the rod tightly in a vise and lubricate the cap and rod. Slide the end cap onto the rod and install thrust pad. Torque thrust pad 84 to 108 in. lbs. (9.5 to 12 N•m).

41848

1. Thrust pad

Lubricate five new manifold body O-rings. Place them in the cylinder body.

41849

Attach the valve pump assembly to the cylinder body with three Pozidriv screws. Torque screws to 60 to 84 in. lbs. (7 to 9.5 N•m).

41850

Oil and install the manual release valve. Thread the valve just past the snap ring groove. Do not install the snap ring at this time. The valve will be removed later for the Pressure Leakdown Test on p. 379.

Install the reservoir filter screen in the cylinder body. Make sure that the screen is seated. Use a 6 mm Allen wrench to install the plug. Tighten the
plug securely.

41863

Lubricate and place a new reservoir O-ring in the cylinder body.

41865

1. O-ring

Attach the reservoir to the cylinder body with three Pozidriv screws. Torque the screws to 35 to 52 in. lbs. (4.0 to 5.9 N•m).

41866

Lubricate the trim rod pistons. Place the rod assemblies into the body. Push them in until the end caps just clear the tops of the cylinders. Fill the cylinders with Power Trim/Tilt & Steering Fluid_. Failure to fill the cylinders could cause difficulty in purging air from the unit.

41867

Screw the trim rod end caps into the cylinder body. Use Trim Cylinder End Cap Remover/Installer, P/N 436710, or Universal Spanner Wrench, P/N 912084. Torque caps to 60 to 70 ft. lbs. (81 to 95 N•m).

41868

Lubricate the tilt rod piston. Slide the end cap all the way up on the rod assembly. Place the piston end of the rod assembly into the cylinder body. Push it in until the end cap just clears the cylinder top. Leave enough room to pour fluid into the cylinder. Fill the cylinder with Power Trim/Tilt & Steering Fluid. Failure to fill the cylinder could cause difficulty purging air from the unit.

41869

Screw tilt cylinder end cap into cylinder body. Use Tilt Cylinder End Cap Remover/Installer, P/N 326485, or Universal Spanner Wrench, P/N 912084. Torque cap to 58 to 87 ft. lbs. (79 to 118 N•m).

41870

Position the pump manifold so the pump mounting surface is level. Install the coupler into the pump.

41852

1.Coupler

Fill the pump cavity with Power Trim/Tilt & Steering Fluid_ up to the top of the two bosses. Rotate the coupler clockwise and then counterclockwise until no more air bubbles come out of the pump.

41854

1.Bosses

Install the filter screen.

1. Filter screen

Lubricate and place a new O-ring on the motor. Make sure the cable is on the transom side of the unit; align the coupler slot with the motor shaft.
Place the motor on the pump manifold assembly.

1. O-ring
2. Cable

Install the four motor screws. Tighten the screws to a torque of 35 to 52 in. lbs. (4.0 to 5.9 N•m).

41858

Fill the reservoir to the bottom of the fill hole with Power Trim/Tilt & Steering Fluid. Install and tighten the reservoir cap. Turn the manual release valve in until it seats. Cycle the unit up and down several times to purge air.

41859

Operate the unit to the full UP position, then run down momentarily to release pressure. Check the fluid level again and add fluid, if necessary. Remember that all rods must be completely up to check the fluid level. Test the unit by performing the Pressure Leakdown Test on p. 379.

41885

Check the tilt rod bushings. Replace them if they are worn excessively.

41888

Check the bushings on the bottom of the manifold body. Replace them if they are worn excessively.

41878

Check system operation in both trim and tilt range.