MAINTENANCE

MAINTAINING DEPTH GAUGE CLEARANCE

See Figures 51, 59, and 60.

■Maintain the depth gauge (A) at a clearance of 0.6 mm (0.25 in.). Use a depth gauge tool for checking the depth gauge clearances.

■Every time the chain is filed, check the depth gauge clearance.

■Use a flat file (B) (not provided) and a depth gauge jointer (C) (not provided) to lower all gauges uniformly. Use a 0.6 mm (0.025 in.) depth gauge jointer. After lowering each depth gauge, restore original shape by rounding the front (D). Be careful not to damage adjoining drive links with the edge of the file.

■Depth gauges must be adjusted with the flat file in the same direction the adjoining cutter was filed with the round file. Use care not to contact cutter face with flat file when adjusting depth gauges.

MAINTAINING THE GUIDE BAR

See Figure 61.

CAUTION:

Make sure the chain has stopped before you do any work on the saw.

Every week of use, reverse the guide bar on the saw to distribute the wear for maximum bar life.The bar should be cleaned every day of use and checked for wear and damage. Feathering or burring of the bar rails is a normal process of bar wear. Such faults should be smoothed with a file as soon as they occur.

A bar with any of the following faults should be replaced:

■Wear inside the bar rails which permits the chain to lie over sideways

■Bent guide bar

■Cracked or broken rails

■Spread rails

In addition, lubricate guide bars (with a sprocket at their tip) weekly. Using a grease syringe, lubricate weekly in the lubricating hole.

Turn the guide bar and check that the lubrication holes (A) and chain groove are free from impurities.

MAINTAINING THE SAFE-T-TIP® NOSE GUARD

See Figures 62 and 63.

CAUTION:

Make sure the chain has stopped before you do any work on the saw.

WARNING:

Although the guide bar comes with a SAFE-T-TIP® anti-kick-back device already installed, you need to check the tightness of the mounting screw before each use.

Tighten the mounting screw (A) of the nose guard as instructed below. These are specially hardened screws. If you cannot install the screw tightly, replace both the screw and the SAFE-T-TIP® (B) before further operation. Do not replace the screw with an ordinary screw.

In addition to preventing chain contact with solid objects at the nose of the bar, the SAFE-T-TIP® also helps keep the chain away from abrasive surfaces, such as the ground. Keep it on the right-hand side of the bar where it will be between the chain and the ground during flush with ground cutting.

The mounting screw requires a 5/16 in. spanner (or adjustable spanner) to achieve the recommended tightness of 4-5 Nm (35 - 45 in. lb.). A tightness within this range can be achieved by using the following method.

1.Tighten the screw with your finger.

2.Tighten the screw an additional 3/4 of a turn using a spanner (C).

MOUNTING THE SAFE-T-TIP® NOSE GUARD

See Figures 62 and 63.

1.Mount the SAFE-T-TIP® on the bar nose.

2.Fit the locking rivet or tab in the recessed hole in the guide bar.

3.Tighten the screw with your finger.

4.From the finger-tight position, tighten the screw an additional 3/4 of a turn using a spanner.

CLEANING THE AIR FILTER

See Figures 64, 65, and 66.

NOTE: Always clean the air filter before making any mixture adjustments of the carburettor.

1.For access to the air filter and carburettor area, loosen the three screws (A) holding the cylinder cover (B).

2.Activate chain brake.

3.Lift the front of the cylinder cover past chain brake lever.

4.Lift the back of the cylinder cover past the handle.

5.Before removing the air filter from the carburettor, blow or brush as much loose dirt and sawdust from around the carburettor and chamber as possible.

NOTE: Be sure to pull the choke rod out to keep the carburettor from being contaminated.

6.Remove the screw (C) securing the air filter (D).

7.Position a flat screw driver between the tabs and twist as shown in the illustration.

8.Lift the air filter off the air filter base.

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Homelite CSP4518 - UT74125D Maintaining the Guide BAR, Maintaining the SAFE-T-TIP Nose Guard, Cleaning the AIR Filter
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CSP3816 - UT74123D, CSP4518 - UT74125D, CSP4520 - UT74127D specifications

The Homelite CSP series of chainsaws, including the CSP4520 - UT74127D, CSP4518 - UT74125D, and CSP3816 - UT74123D, exemplifies innovation and efficiency in the world of outdoor power equipment. Recognized for their user-friendly design, these chainsaws are tailored for both novice users and seasoned professionals, delivering performance and reliability across a range of cutting tasks.

The CSP4520 model features a robust 20-inch bar and chain, making it ideal for tackling larger jobs, such as felling trees and cutting firewood. Its powerful motor ensures consistent performance, while the lightweight design reduces fatigue during extended use. The inclusion of an automatic chain oiler enhances longevity and smooth operation, ensuring that the chain operates fluidly and efficiently.

The CSP4518, with its 18-inch bar, offers a balance of power and maneuverability. This chainsaw is perfect for homeowners and landscapers who need to perform pruning, trimming, and light cutting tasks. The tool-less chain tensioning feature simplifies adjustments, making it easy for users to maintain optimal performance without the need for additional tools. Additionally, the ergonomic handle design provides comfort and control, allowing for precise cutting.

Meanwhile, the CSP3816 model, featuring a 16-inch bar, is designed for light-duty applications. It is an excellent choice for users who require a compact and agile chainsaw for trimming branches and cutting small logs. This model is particularly praised for its easy-start technology, which minimizes pull effort, making it accessible for users of all skill levels. The onboard safety features, including a chain brake and low kickback chain, enhance user safety during operation.

Each of these models incorporates electrifying technologies that contribute to their performance. The Homelite CSP series utilizes a combination of powerful motors, advanced chain mechanisms, and effective safety systems to ensure a smooth cutting experience. Built with durability in mind, these chainsaws are constructed from high-quality materials that withstand the rigors of outdoor use.

In conclusion, the Homelite CSP4520, CSP4518, and CSP3816 chainsaws showcase the perfect blend of power, efficiency, and safety features. Whether for heavy-duty logging or light pruning, these models offer versatility and ease of use, making them a valuable addition to any outdoor toolkit. With their performance-driven design and thoughtful engineering, they stand out in the competitive chainsaw market, appealing to both casual users and professionals alike.
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