woodmizer LASTEC 621ER Manual

PB-0069
If you have any questions, please contact the Lastec service department at 1-317-892-4444
Product Information Bulletin
Date: 04/24/01
Bulletin #: PB-0069
Subject: Defective Hydraulic Hoses
Model Numbers: 621ER, 721XR, 421D, 425HD
Serial Numbers: All
The vendor who manufactures the hydraulic hoses for Lastec has informed us that some hoses may have been
manufactured incorrectly and deemed defective. As part of the pre-delivery inspection, be sure to inspect the hydraulic
hoses. To determine if you have a defective hydraulic hose, do the following:
1. Ensure that the unit is parked on level ground.
2. Switch the unit to the off position.
3. Set the parking brake.
4. Connect the hydraulic hoses to the traction unit. (621ER and 721XR only)
5. Get on the unit and switch the unit to the on position.
6. Cycle the unit 5 or 6 times.
7. Turn the traction unit to the off position and set the parking brake.
8. Check the hoses for leaks.
IMPORTANT: PLEASE PAY SPECIAL ATTENTION TO THE AREA AROUND THE FITTING.
9. In the event that a defective hydraulic hose is located, please order replacement parts from Lastec.
10. Contact the Lastec Customer Service Department for any warranty claims.
Hydraulic Hose Inspection
The hydraulic hoses used on this unit are subject to intense conditions such as:
•Fluctuating pressure while being used
•Extensive exposure to weather, sun and chemicals
•Very warm storage conditions or
•Mishandling during operation or maintenance.
These conditions can cause damage or premature deterioration. Hoses that move during operation are more susceptible to
these conditions than others.
Hydraulic hoses need frequent and routine inspections to ensure that they remain free of deterioration and or damage. It is
important to ensure that all hoses are properly routed and protected from possible damage. It is a good practice to replace
all moving hydraulic hoses, every 2000 hours or 2 years, whichever comes first.
When replacing a hydraulic hose, ensure that the hose is straight (not twisted) before securing the fittings. Note how the
printing on the hoses are positioned. Using two wrenches; tighten the fitting while the other wrench holds the hose in
position.

PB-0069
If you have any questions, please contact the Lastec service department at 1-317-892-4444
WARNING When performing maintenance or disconnecting a hydraulic system, the pressure in system must be
released. This can be done by switching the engine to the off position and lowering or supporting the deck.
IMPORTANT It is extremely important to keep all body part and hands away from any pin hole leaks or fittings that expel
hydraulic fluid under high pressure. Hydraulic fluid that escapes under pressure can have sufficient force to penetrate the
skin.
IMPORTANT Use paper or cardboard, to search for leaks. Do Not use the hands to search for hydraulic leaks. Doing so
can have adverse effects to your