• 3/20/2020
  • By Doosan Infracore North America LLC
A Doosan Wheel Loader Entering A Garage For Maintenance.

With spring comes the official busy season for contractors, and that means firing up your equipment for the first time since fall. But before your machines hit the year’s first jobsite, it’s critical that they each receive a post-winter tune-up.

A full machine inspection lets you shake off any cobwebs and ensure your equipment is ready to roll on day one. Always check the maintenance procedures in a machine’s Operation and Maintenance Manual before moving through the steps below.

And start early: We recommend inspecting your machine a few weeks before it hits the jobsite. Short on time? Find your local Doosan dealer for an assist.

1. Clean the Machine

It’s often overlooked, but always smart: Examine your machine for any grease, dirt or debris left from last year, including in the engine compartment and undercarriage (if it’s an excavator). Then properly lube all machine components and grease any cylinder rods that are out in the open.

2. Check the Battery

Take a look at your battery, inspecting its connections (and cleaning them, if necessary). Note that any corroded terminals can muddle your machine’s hard starting and cause charging headaches as well. Then connect it to the machine. If your battery needs charging every so often, connecting a trickle charger can improve your machine’s battery life.

3. Walk Around the Machine

Look over the full machine from every angle and ensure nothing’s out of work. That includes hoses, cylinders, bushings and pivot points. Look for clear signs of damage, too, such as tearing in rubber tracks or tires. Speaking of which: Make sure any tires are properly inflated with the pressure listed on the tire’s sidewall. All tracks should have the proper track tension, too.

Add oil to and grease all lubrication points, but degrease the hydraulic cylinder rods. Adjust the fan and alternator belt tension as well. Did any components leak while in winter storage? Replace ’em ASAP.

4. Check Oils, Fuel and Filters

Shake the winter off your machine safely by following the hydraulic oil warm-up steps found in the Operation and Maintenance Manual. Ensure any excavator fluids meet the correct ambient temperatures, too — proper fluid level amounts can be found in the manual. Pay special attention while filling all fluids for machines with diesel exhaust fluid (DEF), as changing temperatures can critically affect its purity and concentration.

5. Prep Your Attachments

Visually inspect all attachments, including components such as cylinders, guards, hoses, teeth and cutting edges. Any part that touches ground should be checked for wear and damage. Inspect any fluid levels relevant to the attachments and swap out as needed. Then, once connected, briefly test out the attachment to ensure it’s in working order.