Toyota Pto winch Parts?

[ClassicCruiserSpares]

Can anyone help and tell me if its possible to get Brand new brass gears for the Toyota Pto winches? if so were from? Toyota maybe?
Also ive heard wrong oil could cause these gears to wear?
Mine one on my 40 is badly worn.

[Pedro]

Can anyone help and tell me if its possible to get Brand new brass gears for the Toyota Pto winches? if so were from? Toyota maybe?
Also ive heard wrong oil could cause these gears to wear?
Mine one on my 40 is badly worn.

the gears are made from bronze, and the wrong oil will kill them in no time, actually slowly eats the metal away, as for where from no idea, try toyota or possibly a google search for some one in USA is bound to make em

[chevrolux]

why do you have to use bronze gears to replace them? just thinking out loud but maybe some clever clogs with a cnc mill can do chromoly gears. just a bourbon fuelled thought...

[Pedro]

why do you have to use bronze gears to replace them? just thinking out loud but maybe some clever clogs with a cnc mill can do chromoly gears. just a bourbon fuelled thought...

would be possible i suppose although a steel worm gear onto a steel face with EXTREME pressure may not be a great idea, the bronze has a high level of lead which is a lubricatant , (vague memory from tech), so if metal to metal contact takes place then pick up wont happen.

Pedro

[chevrolux]

so maybe instead of using standard gear oil you use a graphite lubricant?

I knew there would be a good reason for using brass though...

[ClassicCruiserSpares]

What oil do you guys suggest to use? because i think the oil mite of had something to do with it wearing out.

[Pedro]

What oil do you guys suggest to use? because i think the oil mite of had something to do with it wearing out.

what ever the spec is for winch,

Lubrication of Worm Gears
Print Noria Corporation
Tags: gear lubrication
Worm gears operate under difficult conditions, presenting unique lubrication demands. They serve as speed reducers in many different industries and applications. This article addresses how effectively lubricated worm gears affect worm gear performance.

Worm gears are used in various industries and machinery applications. They are unique in their ability to achieve large speed reductions in a compact space. They can transmit high loads at high-speed ratios. Ratios of 20:1 up to 60:1 and higher are normally achieved.

There are three major types of worm gears:

1. Non-throated - a helical gear with a straight worm. Tooth contact is a single moving point on the worm drive. This leads to high unit loads and wear.

2. Single-throated - has concave helical teeth which wrap around the worm. This leads to line contact, permitting higher loads without excessive wear.

3. Double-throated - called a cone or hourglass. It has concave teeth both on the worm and helical gear. This increases from line contact area permitting increased loading and lower wear.



Worm drives are inefficient because the gears experience sliding rather than rolling contacts, leading to operating temperatures much higher than other gear types. Spur gears normally operate at 50°F (28°C) over ambient temperatures while worm gear temperatures typically rise 90°F (50°C) over ambient.

The following factors affect worm gear efficiency:

•Lead angle of the worm
•Sliding speed
•Lubricant
•Surface quality
•Installation conditions
Worm Gear Lubrication
Due to the sideway sliding motion in worm gears, it is difficult to maintain a hydrodynamic oil wedge. This results in gears operating under boundary lubrication conditions. Also, high operating temperatures that approach 190°F (88°C) and higher usually require oils with an ISO VG of 460 (AGMA Class 7) and higher. They also require good thermal and oxidative stability. Table 1 relates ISO viscosity grade with the AGMA Classification System.

The types of oils most commonly used to lubricate worm gears are compounded mineral oils, EP mineral gear oils and synthetics. Each has its own unique characteristics and all three types are used successfully.

Worm Gear Lube Types
Compounded Gear Oils
These lubricants have been used extensively in worm gears with great success in a wide variety of applications. Compounded gear oil is a mineral basestock with normal rust and oxidation inhibitors that is blended with four to six percent acidless tallow or synthetic fatty acid (the compounding agent). The surface-active compounding agent gives these products excellent lubricity and prevents sliding wear in worm gears.

Many OEMs recommend compounded gear oils. Compounded oils were initially used as steam cylinder lubricants because of their ability to adhere to cylinder walls in the presence of steam. The temperature limitation of compounded oils is approximately 180°F (82°C). Because compounded lubricants are difficult to use out of this temperature range, they are often replaced with EP gear oils for consolidation purposes.

Most applications normally use an AGMA Class 7 or 8 compounded oil (ISO VG 460 and 680). In some cases, an 8A (1000 VG) is used. The viscosity selection depends on the worm’s type, size, speed and operating temperature. Refer to the OEM for specific viscosity recommendations.

Typical commercial oils: Mobil 600W Cylinder and Super Cylinder Oil, Texaco Vanguard 460 and 680, Exxon Cylesstic 460 and 680, and Chevron Cylinder Oils 460 and 680.

Extreme Pressure (EP) Gear Oils
EP mineral gear oils are used more extensively in worm gears. Under conditions of high pressure and temperature, the EP (antiscuff) additive reacts with the metal surface to form a soft, slippery chemical layer which prevents severe wear and welding. Previously, there was a concern that sulfur-phosphorous EP additives would react with the bronze gear. However, new EP additive technology used by most of the major lubricant suppliers has reduced the corrosive attack by utilizing nonactive sulfur. EP lubricants work particularly well when shock loading occurs. EP gear oils also protect steel gears better than compounded gear oils.

Typical recommendations are for both AGMA 7 and 8 viscosity grades. Like compounded gear oils, EP gear oils limit operating temperatures to under 180°F (82°C).

Typical commercial oils: Shell Omala, Texaco Meropa, Exxon Spartan EP, Mobilgear 634 and 636, and Chevron EP Gear Oil.

Synthetic Worm Gear Oils
Two major types of synthetic gear oils have been used successfully in challenging conditions with worm gears: polyalphaolefins and polyalkelene glycols.

Polyalphaolefins (PAOs) are the most common type of synthetic lubricant. They have good high and low temperature properties and are compatible with most mineral oils. Unlike some synthetics, PAOs don’t attack paints or seals. Most formulations contain a small amount of organic ester or antiwear mineral that improves boundary lubrication conditions. Products that contain EP additives are also available. There are no major disadvantages, other than cost, when using PAOs as worm gear lubricants.

Typical commercial oils: Chevron Tegra, Texaco Pinnacle, Exxon Teresstic SHP, Mobil SHC, Shell Hyperia and Royal Purple Synergy.

Polyalkylene glycols (PAGs) are excellent for worm gear applications. They possess superior lubricity properties and have good low and high temperature properties. The Viscosity Index of PAGs is higher than most synthetics, approaching 280. Therefore, a lower initial viscosity grade can be used minimizing internal friction resulting in improved worm gear efficiency. Most PAGs contain antiwear properties but there are no formulations with EP additives.

Besides cost, a major disadvantage of polyalkylene glycols is their incompatibility with other fluids. They also attack paints, seals and polycarbonate sight glasses.

Typical commercial oils: Shell Tivela and Mobil Glygoyle HE.

[monstr]

Hi Mate PM Smiddy on here ,I know he had a custom set made out in Sth Auckland, from memory it was around $700 for the Bronze gear and matching worm drive.

Can anyone help and tell me if its possible to get Brand new brass gears for the Toyota Pto winches? if so were from? Toyota maybe?
Also ive heard wrong oil could cause these gears to wear?
Mine one on my 40 is badly worn.

[jocko]

Can anyone help and tell me if its possible to get Brand new brass gears for the Toyota Pto winches? if so were from? Toyota maybe?
Also ive heard wrong oil could cause these gears to wear?
Mine one on my 40 is badly worn.

I was using normal gear oil with moreys oil stabiliser when i first fitted my PTO winch, which is fitted with a breather hose running up into the engine bay. I found this oil to be totally unsuitable for the brass worm drive. It made the oil run hot as hell, it was so hot it was boiling over through the overflow. It also made the worm drive make that loud baulking kind of noise when it was only under moderate load and speed. The oil was also burnt and had alot of filings when i changed it, Which i did several times when using normal gear oil and moreys.
Upon recommedation from a friend, I switched to Mobil 600W Cylinder and super cylinder oil as mentioned in the posted article below. What a huge difference that made. The oil now never gets hot, never hot enough that you can't touch the gear case. Truck has been through Waitawheta and done various other Teams events, HB tough Truck, multiple club runs etc. And the winch can do virtually any pull on a single line and at high speed. 3rd and 4th gear mostly 2-3000rpm and down to 2nd only on severe loading. I think I'v only changed the oil once in 2years since i swapped to the 600W oil and it still comes out reasonably clean with only very fine filings, more like bronze dust.
I would say your best bit would be to buy another used winch for parts as most off wrecked road trucks have done very little work. Even though mine had done quite a bit of work on the wrong oil i did not strip it and just changed the type of oil and it seems to be fine. Hope this helps.

[Clint]

Good info above on the oil

Klembo has had new bronze gears made for the monster Gillies unit on the winch truck at Precision Gears in Rotorua. For a Toyota PTO it would be way cheaper to find an unmolested 2nd hand one.

Cheers
Clint

[ClassicCruiserSpares]

Cheers for the info guys its all sorted now.