Figure 7-7

NOTE: When replacing the blade, be sure to install the blade with the side of the blade marked ‘‘Bottom’’ (or with a part number stamped in it) facing the ground when the mower is in the operating position.

caution: Use a torque wrench to tighten the blade spindle hex flange nut to between 70 lbs-ft and 90 lbs-ft.

Changing the Deck Belt

WARNING! Be sure to shut the engine off, remove ignition key, disconnect the spark plug wire(s) and ground against the engine to prevent unintended starting before removing the belt.

WARNING! All belts on your tractor are subject to wear and should be replaced if any signs of wear are

present.

IMPORTANT: The V-belt found on your tractor is specially designed to engage and disengage safely. A substitute (non- OEM) V-belt can be dangerous by not disengaging completely. For a proper working machine, use factory approved belts.

For 38” Decks

To change or replace the deck belt on your tractor, proceed as follows:

1.Lower the deck by moving the deck lift lever into the bottom notch on the right fender.

2.Remove the belt guards by removing the self-tapping screws that fasten them to the deck.

3.Remove the belt keeper rod from around the engine pulley.

WARNING! Avoid the possibility of a pinching injury. Do not place your fingers on the idler spring or between the belt and a pulley while removing the belt.

4.Remove the deck belt from around all pulleys, including the deck idler pulley.

5.Route the new belt as shown in Fig. 7-9.

6.Remount the belt guards removed earlier.

For 42” & 46” Decks

To change or replace the deck belt on your tractor, proceed as follows:

1.Remove the deck as instructed earlier in this section.

2.Remove the belt covers by removing the hex screws that fasten them to the deck. See Fig. 7-8.

Hex Washer Screws

Spindle Pulley

Belt Cover

Belt Guard

Deck Idler Pulley

Figure 7-8

3.It may also be necessary to loosen the hex nut on the left idler pulley to get the belt off the pulley and around the belt guard.

4.Carefully remove the deck belt from around the two spindle pulleys and the two deck idler pulleys. See Fig. 7-8.

5.To place the new belt, begin by routing the belt around the two outer spindle pulleys as shown in Fig. 7-8.

6.Then route the belt around the two deck idler pulleys as shown in Fig. 7-8.

7.Retighten the belt keeper rod loosened earlier.

8.Remount the belt guards removed earlier.

9.Re-install the deck, making sure the belt remains routed around the pulleys as instructed. See Fig. 7-10.

10.Pull the right side of the belt, and place the narrow V side of the belt into the PTO pulley.

11.While holding the belt and pulley together, rotate the pulley to the left. Continue holding and rotating the pulley and belt until the belt is fully rolled into the PTO pulley.

Changing the Transmission Drive Belt

NOTE: Several components must be removed and special tools (i.e. air/impact wrench) in order to change the tractor’s drive belt. See an authorized MTD Service Dealer to have your drive belt replaced or phone Customer Support as instructed on page 2 for information on ordering a Service Manual.

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Section 7— Service

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MTD 1438, 1842 warranty Changing the Deck Belt, Changing the Transmission Drive Belt, For 38 Decks, For 42 & 46 Decks
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1842, 1438 specifications

MTD 1438 and MTD 1842 are part of the MTD product line, which is known for, providing reliable and efficient solutions in the agricultural and gardening sectors. These models stand out due to their performance features, technology integrations, and user-friendly characteristics, making them suitable for both professionals and enthusiasts.

The MTD 1438 is a compact, versatile lawn tractor designed for small to medium-sized lawns. It is powered by a robust 14.5 HP engine that delivers reliable performance. One of its main features is the 38-inch cutting deck, which allows for a clean and efficient cut. The deck height can be easily adjusted to achieve the desired grass length, catering to various mowing conditions. The tractor also features a durable steel frame, which enhances stability and extends the lifespan of the machine.

In terms of technology, the MTD 1438 is equipped with an automatic transmission that simplifies operation, allowing users to focus on mowing rather than shifting gears. The user-friendly dashboard provides essential information at a glance, ensuring that users can monitor their machine’s performance without any hassle.

On the other hand, the MTD 1842 offers additional power and capabilities, making it suitable for larger lawns or more rugged landscapes. With a 18 HP engine, this model features a wider 42-inch cutting deck, allowing for increased efficiency by covering more ground in less time. It also maintains an adjustable cutting height, giving users flexibility in managing grass lengths across different terrains.

One of the standout characteristics of the MTD 1842 is its hydrostatic transmission. This technology offers seamless speed control, enabling smoother acceleration and easier navigation around obstacles. The tractor also features a comfortable seat and an ergonomic steering wheel, enhancing the overall user experience during longer mowing sessions.

Both models prioritize durability and ease of maintenance. They come with easy-access maintenance points, making it simple for users to keep their machines in top condition. Additionally, the design of both tractors allows for simple attachment of various accessories, such as baggers or mulching kits, increasing their versatility.

In summary, MTD 1438 and MTD 1842 are excellent choices for those seeking robust, efficient lawn care solutions. With their powerful engines, user-friendly technologies, and durable designs, these models offer reliability and performance that can meet a variety of landscaping needs. Whether tackling small yards or larger properties, these tractors provide the tools necessary for achieving a pristine lawn.
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