Yamaha Autolube 2T Oil Pump Servicing

Removing the throttle control cable

The speaker discusses removing a cable connected to the throttle control and mentions the absence of a clip that should prevent it from being pulled out.

Removing the cable

• The speaker states that they will remove the cable connected to the throttle control.

• Mentions that there should be a clip to prevent it from being pulled out, but it is already missing.

Identifying hoses

The speaker identifies two hoses and explains their functions.

Hoses

• There are two hoses present.

• One hose is going to the 2T pump inlet.

• The smaller hose is going to the 2T pump outlet.

Oil leakage issue

The speaker addresses an issue with oil leaking on one end of the small hose.

Oil leakage

• Many people experience 2T oil leaking on this end of the small hose.

• The speaker plans to cut and re-connect the loose end of the hose, securing it tightly with a wire.

• Mentions that finding a replacement for this small hose can sometimes be difficult.

Removing screws for 2T pump assembly

The speaker demonstrates how to remove screws for disassembling the 2T pump assembly.

Screw removal

• There is an original clip present, but it has been lost.

• To remove the 2T pump, there are only two screws.

• An impact screwdriver was used for one screw, which is now loose.

• The other screw had a damaged head, so a drill was used to remove it by drilling out and removing its head.

Remaining screw and pump assembly

The speaker mentions the remaining good screw and identifies the 2T Oil Pump Assembly.

Remaining screw and pump assembly

• Only one good screw remains after removing the damaged one.

• The speaker points out the 2T Oil Pump Assembly, which will be rebuilt.

Disassembling the 2T oil pump

The speaker begins disassembling the 2T oil pump to inspect its parts.

Disassembly process

• A circlip is removed from the assembly.

• The plastic worm gear wheel is then taken out.

• There is a pin that needs to be removed next.

• After removing the pin, the worm gear shaft can be taken out.

• The inside of the pump is found to be very dirty due to years of non-use.

Removing oil seal

The speaker removes an oil seal that may be causing engine oil leakage on the 2T pump side.

Oil seal removal

• An oil seal is identified as a potential cause for engine oil leakage on the 2T pump side.

• The speaker plans to replace this oil seal with a new one.

Examining parts and planning repair

The speaker discusses examining parts and planning to repair the 2T oil pump assembly.

Parts examination and repair plan

• One of the screws that was drilled out earlier is shown, and attempts are made to remove it with pliers.

• The speaker decides to disassemble and rebuild the 2T oil pump to assess its condition and identify parts that need replacement.

• Cleaning all parts of the 2T oil pump using a water-based degreaser is planned.

Cleaning the 2T oil pump

The speaker emphasizes the need to clean all parts of the 2T oil pump due to its dirty condition.

Cleaning process

• The inside of the 2T pump is described as very dirty, requiring thorough cleaning.

• A water-based degreaser is used to clean all parts of the pump.

Addressing an issue with a part

The speaker identifies a part with a flat spot and plans to fix it.

Fixing a part

• A part with a flat spot is identified.

• The speaker intends to pull out a pin by removing a circlip in order to address this issue.

Autolube Pump Disassembly

In this section, the speaker discusses disassembling the autolube pump and replacing worn-out parts.

Removing the Pin

• The speaker plans to use a nail to punch out the pin from one side of the pump.

• The pin is successfully removed using a small nail.

• The speaker punches out the pin from the other side to completely remove it.

Examining Worn-Out Part

• The speaker points out a worn-out part with a flat spot.

• They insert a new part into the hole to replace the worn-out section.

Smoothing Rough Spot

• The speaker uses a drill to smooth out a rough spot on another part of the pump.

• They apply WD40 and fine grit sandpaper to achieve a smooth surface.

Assembly Preparation

• After completing necessary repairs, the speaker prepares for reassembly.

Oil Seal Installation

In this section, the speaker focuses on installing oil seals in specific parts of the autolube pump.

Different-Sized Oil Seals

• The speaker wonders why there are two small oil seals in their kit.

• It is suggested that other models may have different-sized pistons requiring different seals.

• One oil seal fits correctly while another does not.

Installing Oil Seals

• The correct oil seal is installed with its spring visible on the outside.

• The speaker presses the seal in with their fingers and a flat screwdriver.

• Another oil seal is installed using a pick tool.

Cleaning Nozzle and Valve

In this section, the speaker cleans the nozzle and valve of the autolube pump.

Nozzle Inspection

• The speaker opens the nozzle to inspect it.

• They find it to be very dirty, requiring thorough cleaning.

Cleaning Process

• The inside of the nozzle is cleaned to remove debris.

• The speaker mentions that the camera cannot capture how dirty it was inside.

• Other parts, including holes, are also cleaned.

Autolube Pump Assembly

In this section, the speaker begins reassembling the autolube pump after completing necessary repairs and cleaning.

Reassembly Process

• The plunger part is fixed onto the piston pin.

• Further assembly steps are not covered in this transcript.

Assembly of Plunger

In this section, the speaker demonstrates the assembly process of the plunger.

Assembly Steps

• The speaker pulls out the pin and turns it around.

• The piston part of the plunger is polished using fine grit sandpaper to make it smooth. -

• A correct screw is found for the outside of the plunger. -

• The assembly starts with inserting a small washer to hold the spring in place. -

• The plunger is inserted into a groove where a pin goes in temporarily to hold it in place. -

• A washer is attached temporarily to secure the plunger in place. - [0;21;47] (1307 s)

1[00;22;01] (1321 s) Assembly of Gear and Washer

In this section, the speaker demonstrates how to assemble gears and washers.

Assembly Steps

• The gear, worm gear wheel, can be placed either way as both sides are identical. It should be fixed in place. [](1325 s)-[](1347 s)

• A big washer can go on either side of the gear. [](1350 s)-[](1360 s)

• Another part connects to the plunger. [](1362 s)-[](1375 s)

• A wavy-looking spring washer and another washer are added. [] (1375s) - [] (1388s)

2 Assembly of Main Housing

In this section, the speaker demonstrates how to assemble the main housing.

Assembly Steps

• The one-way valve is installed first, with a steel ball and a spring inside the nozzle. -

• The speaker uses a small socket and a hammer to push in the valve assembly. -

• The plunger's movement is checked to ensure correct alignment. -

3[0;27;58] (1678 s) Final Assembly Steps

In this section, the speaker demonstrates the final assembly steps.

Assembly Steps

• Washers and shim spacers are installed based on desired oil output. [0;27;58] (1678 s)-[28m01] (1681 s)

Note that some timestamps were not provided for certain bullet points in the transcript.

The Thickness of Shims and Oil Output

In this section, the speaker discusses the relationship between the thickness of shims and the amount of oil output.

Adjusting Shims for Oil Output

• The speaker mentions that one item looks thinner.

• It is noted that this particular item reads 0.5 mm.

• Thicker shims result in more oil coming out.

Assembly Steps

• The speaker instructs to put the shims spacers.

• Then, a washer should be added.

• Next, a lock washer is placed.

• Finally, a small nut is added.

Testing the Plunger

• The speaker plans to test it.

• They will use the worm gear's worm for testing.

• A hand drill will be used during testing.

• A few lubrication will be applied before testing.

• The plunger's functionality will be observed during testing.

Pump Stroke at Different Throttle Positions

This section focuses on how pump stroke varies with throttle positions and its impact on oil output.

Pump Stroke at Idle Throttle Position

• At idle throttle position, the pump stroke is very short, resulting in less oil output.

Pump Stroke at Full Throttle Position

• At full throttle position, a specific part turns which allows the plunger to have longer strokes freely.

• The plunger can freely travel without any obstruction, allowing for longer strokes and increased oil output.

Timestamps are provided in the format hh:mm:ss where XXXX represents the number of seconds.