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A crossbow is a serious piece of mechanical equipment under enormous stored energy — well over 100 pounds of draw weight held under tension every time you cock it. Treated properly, a quality crossbow gives you fifteen-plus years of reliable service. Neglected, the same crossbow can fail catastrophically: dry-fire damage, string failure, broken cams, even injury to the shooter. This guide walks through the routine maintenance that keeps a crossbow performing accurately and safely, the inspections that catch problems before they become emergencies, and the long-term care that maximizes the life of your investment.
Routine Maintenance: What and How Often
Before Every Hunt or Range Session
A 60-second pre-shoot inspection catches most problems before they cause damage:
- Visual check of strings and cables: look for fraying, separated strands, or visible damage. Any strand failure on a primary string means take the bow out of service immediately.
- Limb inspection: any cracks, splits, or delamination on the limbs is an immediate stop-shooting condition. Limb failures under load can cause serious injury.
- Rail and barrel inspection: look down the rail or barrel for debris, gouges, or any rough spots that would damage an arrow.
- Riser and cam bolt check: confirm all visible bolts are seated tight. A loose limb bolt is dangerous; a loose accessory bolt is just annoying.
- Cocking device function: cycle the device empty (with no string in it, if it’s a removable rope cocker) to confirm smooth operation.
- Scope and mount: check that the scope mount is tight and the scope has not shifted in the rings.
Every 50-100 Shots
- Wax the strings and cables: a light coat of crossbow-specific string wax extends string life significantly. Avoid wax on the serving (the wrapped center section); wax only on the visible string strands.
- Lubricate the rail or arrow track: a light coat of rail lube reduces friction and string wear. Wipe excess off the limb area.
- Re-check fastener tightness: shooting vibration loosens screws over time. Tighten anything that’s not at spec.
Annually (Pre-Season)
- Deep clean and inspection: wipe down the entire bow with a clean cloth. Inspect every component carefully.
- Verify scope zero: even if the bow was stored properly, confirm zero before the season starts.
- String and cable assessment: replace if you see any concerning wear, separation, or significant stretching.
- Bolt torque check: re-torque all limb bolts and major fasteners to manufacturer spec.
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String and Cable Care: The Most Important Maintenance
String life is the single biggest variable in long-term crossbow ownership. A properly cared-for string can last 2-3 hunting seasons or 1,500-2,000 shots; a neglected string can fail within months. Here’s what extends string life:
Regular Waxing
String wax is the simplest and most important maintenance you can do. Apply a thin coat to the bowstring and cables every 50-100 shots or every few weeks during heavy practice periods. Work the wax into the strands gently with your fingers; don’t rub aggressively or with heat.
Wax frequency increases in dry conditions, after wet hunts, or after sustained heavy use. If the strings look “fuzzy” or you can see daylight between individual strands, you’ve waited too long — wax immediately.
Don’t Leave the Bow Cocked Overnight
Modern crossbows hold cocked tension for short periods without significant string damage, but leaving them cocked for days or weeks accelerates string fatigue. De-cock at the end of every hunt:
- If your bow has an integrated de-cocking system (Ravin’s, TenPoint’s ACUslide), use it.
- If not, shoot a discharge arrow into a soft target before leaving the woods.
- Don’t store a cocked bow in your truck or garage overnight, even for a single day.
Replace Strings on Schedule
Even with perfect care, strings eventually need replacement. Manufacturer guidance varies; typical replacement intervals are:
- Every 1,500-2,000 shots, OR
- Every 2-3 hunting seasons, OR
- Immediately upon any visible damage, separation, or significant stretching
Many crossbow owners have professional shops handle string replacement because the process requires a bow press for safety. Some modern crossbows like the Ravin have been designed with user-replaceable strings and cables, which is a meaningful long-term cost advantage.
Lubrication: Where and What
Where to Lubricate
- Rail or arrow track: light coat of rail lube every 50-100 shots
- Trigger mechanism: usually requires no user lubrication; some manufacturers specify periodic light lube
- Cam axles: typically sealed bearings; lube only if specifically recommended by the manufacturer
- Cocking device cables and pulleys: light lube on the rope or cable, but follow manufacturer guidance
What Not to Lubricate
- The strings themselves (use string wax, not lube)
- The string serving (the wrapped section in the center)
- The trigger sear unless specifically directed by the manufacturer
What to Use
Use products designed for crossbows or compound bows. Avoid general-purpose oils and lubes that can damage string fibers or attract dust to the rail.
Cleaning
Routine Cleaning
- Wipe down the entire bow with a clean, dry cloth after every hunt to remove moisture, sweat, and debris.
- For dirt or mud, use a damp cloth followed by a dry one. Avoid getting moisture into the trigger or cam mechanisms.
- Wipe the scope lenses with appropriate lens cleaning supplies.
After Wet Hunts
If the bow has been in significant rain or snow:
- Wipe down all surfaces with a dry cloth as soon as possible.
- Inspect strings and cables for water absorption — if they feel saturated, allow them to dry completely before storage.
- Pay particular attention to the trigger mechanism and cam housings; water in these areas can cause corrosion.
- Apply a fresh coat of string wax after the bow is fully dry.
Storage
Short-Term Storage (Between Hunts)
- Store the bow de-cocked in a soft case or hard case
- Cool, dry location — not the back of a truck
- Standing vertically or laying flat — avoid pressure on the limbs
- Out of direct sunlight (UV can degrade synthetic components over time)
Long-Term Storage (Off-Season)
- Clean the bow thoroughly before storage
- Apply fresh string wax
- Store in a climate-controlled location if possible
- De-cocked, in a hard case for protection
- Inspect monthly during off-season storage for any unexpected issues
Inspections That Catch Problems
String Separation
Look at the strings under good light. Individual strands should be tight together with no visible gaps or unraveling. Any single broken strand means the string needs replacement before further shooting.
Serving Wear
The serving is the wrapped center section that contacts the arrow nock. Wear on the serving is normal; significant separation or unraveling of the serving means it’s time for a fresh serving or string.
Cam Lean
The cams should be aligned with each other when at rest. Visual misalignment — one cam tilted relative to the other — can indicate a cable problem or a cam that has shifted on its axle.
Limb Cracks
This is the most critical inspection. Examine each limb under bright light. Look for any cracks, splits, delamination, or rough spots. Any of these mean the bow should be taken out of service immediately and inspected by a qualified technician.
Trigger Function
The trigger should pull smoothly and consistently. If you notice creep, gritty feel, or inconsistent break, the trigger may need professional service.
Common Maintenance Mistakes
Over-Lubricating the Rail
A heavy coat of rail lube attracts dust and dirt, which abrades the rail and the arrow over time. A light, even coat is correct.
Ignoring Limb Damage
The temptation when you see a small crack is to keep shooting “carefully.” Don’t. Limb failures happen suddenly under full load, and the energy released can cause serious injury. Any limb damage means the bow is out of service until it’s professionally inspected.
Storing Cocked
Even short periods cocked accelerate string and cable fatigue. De-cock at the end of every hunt without exception.
Leaving Strings Unwaxed for Months
String wax dries out and wears off. Unwaxed strings dramatically shortened their useful life. Wax at least once a month even during off-season storage.
DIY String Replacement Without Proper Equipment
A crossbow under tension stores serious energy. Attempting string replacement without a proper bow press, or without manufacturer-specific tools and knowledge, can cause injury and damage the bow. Pay a qualified shop for this work.
Frequently Asked Questions
How often do I really need to wax the strings?
Practical guidance: every 50-100 shots, every 4-6 weeks during off-season storage, and any time the strings look dry or “fuzzy.” Over-waxing is essentially impossible — under-waxing is the common mistake.
Can I dry-fire a crossbow safely if I do it once?
No. A single dry-fire can cause catastrophic damage to the bow and serious injury to the shooter. Never dry-fire a crossbow. If you need to discharge for any reason, shoot into a soft target with a proper arrow.
What’s a discharge arrow?
A discharge arrow is an arrow specifically used for safely discharging the bow when you need to de-cock without a built-in de-cocking system. It’s a regular arrow shot into a soft target. Modern bows with integrated de-cocking systems eliminate the need for discharge arrows.
How do I know when to replace my strings?
Replace strings when you see visible damage (broken strands, separation, significant wear), when the string has reached its manufacturer-recommended life (typically 1,500-2,000 shots or 2-3 seasons), or when you notice any inconsistency in arrow flight that can’t be explained by other factors.
Should I have my bow professionally serviced annually?
For most quality crossbows used regularly, annual professional inspection and tune-up is a good investment. It costs $50-$150 typically and includes string and cable inspection, trigger check, limb inspection, and any minor adjustments needed. Catching a problem in the shop is much better than discovering it on opening day.
The Bottom Line
Crossbow maintenance is straightforward, inexpensive, and disproportionately valuable. Five minutes of inspection before each shoot session, ten minutes of waxing and lubing every few weeks, an annual professional check, and regular string replacement at the appropriate interval — these practices keep your crossbow performing accurately and safely for over a decade of hard use. Skip the maintenance, and you accelerate string failure, accuracy degradation, and the risk of mechanical problems that ruin hunts or cause injury.
A well-maintained crossbow is a precision tool. Treat it like one, and it rewards the care with reliable performance season after season.