Where to Find the IH 1300 Sickle Bar Mower Manual and What Actually Matters in It
The IH 1300 sickle bar mower is a straightforward piece of farm equipment, but keeping it running reliably takes more than just reading the manual. The manual itself is largely focused on basic maintenance intervals, belt routing, and cutterbar adjustments. Most of the real knowledge lives in the margins and the places the manual doesn't cover well. I spent years running these mowers on rental ground and in custom cutting operations. The manual you want is the International Harvester Operator's Manual for the IH 1300 sickle bar mower attachment. These are often listed under part number C-7065 or similar designations depending on the year. You can usually find scanned copies on tractor manuals websites like TractorManuals.com, ManualsLib, or on eBay where people sell original prints. Sometimes you can get them free through farm libraries or county extension offices.
What the Ih 1300 Sickle Bar Mower Manual Gets Right and Where It Falls Short
The manual covers the basics adequately. Grease points, daily inspections, belt tension specs, and the basic cutterbar replacement procedure are all there. It tells you to lubricate the pitman arm bearings and the finger clip bearings every eight hours of operation, which is about right for normal conditions but borderline insufficient if you're cutting wet or sandy material. What the manual doesn't tell you clearly enough is that the critical adjustment on a sickle bar mower isn't the gap between the knife and the guard plates. It's the timing. The knife needs to reach the back of each finger clip at exactly the right moment in its stroke. If the timing is off by even a fraction of an inch, you'll get poor cutting action, increased wear, and more power draw from the PTO. The manual gives you a procedure for setting timing using a timing mark on the pitman arm, but it doesn't explain what it should feel like when it's correct. When timing is right, the cut is clean and quiet. When it's wrong, you hear a knocking sound and the mower bogs down more easily. Another thing the manual glosses over is the relationship between reel speed and ground speed. Beginners tend to set the reel rotation fast and then wonder why the crop is being thrown around instead of laid down gently for the knife. The sweet spot is usually somewhere between one and a half to two times the forward travel speed, depending on crop height and moisture. Thicker, wetter hay needs a gentler reel. The manual doesn't have a chart for this because it varies too much, but it's worth noting.
A Specific Problem I Ran Into
One issue that came up repeatedly on my machines was wear in the pitman arm bushings. The manual tells you to replace the pitman assembly as a unit if there's excessive play, which is fine advice but expensive and sometimes unnecessary. I found that in many cases the bushing inside the pitman arm was worn while the arm itself was still straight and serviceable. I started having a local machine shop fabricate a bronze sleeve to fit inside the existing bore. This restored proper clearance for a fraction of the cost of a new pitman assembly. I used a layer of thread locker on the outside of the sleeve to keep it seated, and the repair held for thousands of hours. It's not something the manual mentions because it's an aftermarket solution, but it's a legitimate workaround. When someone picks up an IH 1300 that's been sitting for a while, the first thing I check is the belt condition and routing. These mowers use multiple V-belts running off a single PTO input. The belt diagram in the manual is usually accurate, but people reassemble these things incorrectly all the time. An overtightened belt will destroy the PTO gear box bearing within a season. A loose belt will slip and burn through in a few hours of cutting. The manual recommends about half an inch of deflection when you press on the belt midway between pulleys, which is a decent rule of thumb. I've found that a fresh belt needs checking after the first hour of operation and again after the tenth hour as it seats in. After that, every two weeks during the cutting season is about right. If you've checked the timing, the gap between knife and guards, the sharpness of the knife edges, and the condition of the finger clips, and it's still not cutting cleanly, there are a few other things to consider. The most common overlooked cause is a bent center plate or worn guard teeth. If the knife has impact damage from hitting rocks or stumps, the cutting edges inside the fingers will develop nicks and eventually won't shear properly against the stationary finger. You can dress minor nicks with a flat file, but when the wear is significant, replacing the knife is the only fix. Don't try to run a bad knife and expect good results. It wastes fuel, creates uneven cuts, and accelerates wear on everything else.
Get the Full Details
Ground speed matters more than most operators realize. Running the mower too fast while the knife is in marginal condition will make the cut quality terrible. Slow down and the same mower often cuts acceptably. This isn't a mechanical problem, it's an operational one, and it's easy to miss because you assume the equipment is the issue when it's really your approach speed. The manual is a starting point, not the whole story. The real work happens between the grease zerk and the next day's cutting schedule.
